2019-04-12         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Updated in preparation for a release.

2019-04-07         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated from GNULIB.

2019-04-05         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (load_casetable): Always use the locale's settings.
	(set_IGNORECASE): Don't call load_casetable.
	* main.c (main): Call load_casetable if in a single-byte locale.

2019-03-22         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated from GNULIB.

2019-03-17         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Fix test for ZOS_FAIL.

2019-03-15         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (pc/Makefile.tst): Yet another fix for out-
	of-tree builds. Thanks to `make distcheck'.
	* configure.ac: Update version for next tar ball.

2019-03-03         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Fix help message.

2019-03-01         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (pc/Makefile.tst): Make sure pc/ directory exists
	first. Needed for `make distcheck'. Not sure what changed such
	that this is only showing up now.
	* configure.ac: Update version for next test tarball.

2019-02-28         Arnold D. Robbins     <arnold@skeeve.com>

	* README.cvs: Removed. Six years is long enough.

2019-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated from GNULIB.

2019-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated.

2019-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	Small profiling improvements. Suggested by mukti
	<ferida.cicatriz@gmail.com>.

	* main.c (parse_args): Add warnings that --profile overrides
	--pretty-print.
	(main): Move setuid warning to after all the warnings for conflicting
	arguments.
	* profile.c (pprint): Don't print extra trailing space after return
	and exit if no value associated with the statement.

2019-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Set ZOS_FAIL if on ZOS to improve test suite on that
	platform.
	* awk.h (is_valid_identifier): Move declaration outside ifdef DYNAMIC.
	* command.y: Fix test for EBCDIC to use USE_EBCDIC.
	* custom.h: Remove definitions of __builtin_expect.
	* eval.c (update_ERRNO_string): Add untested and disabled code for z/OS
	to remove leading IBM error codes.  This might one day make more of the
	tests pass on z/OS.

2019-02-20         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (is_valid_identifier): Move declaration outside of
	`#if DYNAMIC'.  Thanks to Daniel Richard G.
	* custom.h (builtin_expect): Remove definitions, now
	handled by support/cdefs.h.

2019-02-17         Arnold D. Robbins     <arnold@skeeve.com>

	Fix debugger eval command so that return from a called
	user-defined function works. Thanks to Lothar Langer
	<lotharla@gmail.com> for the report.

	* awk.h (Op_K_return_from_eval): New opcode.
	(parse_program): Add boolean second parameter, `from_eval'.
	* awkgram.y (called_from_eval): New variable
	(Grammar): Check it for return statements. If true, change the
	opcode to Op_K_return_from_eval.
	(parse_program): Set called_from_eval to value of from_eval parameter.
	* debug.c (pre_execute_code): Change test for Op_K_return to test
	for Op_K_return_from_eval.
	(do_eval): Call parse_program with second parameter true.
	* eval.c (optypetab): Add entry for Op_K_return_from_eval.
	* interpret.h (r_interpret): Ditto: can't-happen error.
	* main.c (main): Call parse_program with second parameter false.
	* NEWS: Updated.

2019-02-15         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: If profiling, correctly turn `print' into `print $0'.
	Thanks to Hermann Peifer for the bug report.
	* TODO: Updated.

2019-02-11         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Update version for next test tarball.

2019-02-07         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated.
	* config.guess, config.rpath, config.sub: Updated from GNULIB.

2019-02-05         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (EXTRA_DIST): Add NEWS.1.

2019-02-04         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS.1: Rotated in from NEWS.
	* NEWS: Shortened to start over again with 5.0 changes.
	* ext.c (is_valid_identifier): Move outside of ifdefs so that
	DJGPP (and other code) can find it.

2019-02-03         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (snode): Disallow @/.../ as second param of index, also.
	* TODO: Updated.

2019-02-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Regenerated with Bison 3.3.
	* NEWS: Updated.

2019-02-02  Eli Zaretskii  <eliz@gnu.org>

	* debug.c (execvp) [__MINGW32__]: Redirect to w32_execvp.
	(restart): No need for MinGW-specific code anymore.

	* nonposix.h: If setlocale is already a defined macro, #undef it
	before redefining.  This avoids compilation warnings if someone
	tries to compile Gawk with Gettext's libintl.h, which redirects
	setlocale to its own function.
	Reported by Budi <budikusasi@gmail.com>.

	* debug.c [__MINGW32__]: Prototype for w32_execvp.
	(restart) [__MINGW32__]: Call w32_execvp instead of execvp.  Don't
	type-cast d_argv anymore.

2019-01-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (qualify_name): Return duplicated strings.
	(yylex): Qualify names before returning either NAME or FUNC_CALL.
	(Grammar): Replace qualified_name non-token with NAME, remove
	`qualified_name' production.

2019-01-27         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am, NEWS, awkgram.y, cint_array.c, custom.h, debug.c,
	eval.c, ext.c, gawkapi.c, int_array.c, interpret.h, nonposix.h,
	profile.c, re.c, replace.c, str_array.c, symbol.c: Update
	copyright year.

2019-01-26         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (pc/Makefile.tst): Fix to work for out of tree builds.

2019-01-25         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (UPDATE_YEAR): Bump to 2019.
	(usage): Revise help message a little bit.
	* configure.ac: Bump version to start a release spiral.
	* NEWS: Updated.

2019-01-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): Add new production `qualified_name' which
	is NAME + qualification call. Use it everywhere that NAME was
	used, except for function parameters.

2019-01-23         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (adjust_namespace): Check for all upper case
	identifiers so we don't get things like awk::NF.

2019-01-23         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (lookup): Remove second `do_qualify' parameter.
	Remove calls to `fix_up_namespace'.  If name starts with
	"awk::" just lookup the compnent name.
	Adjust all calls to `lookup' in other files.
	(install): Don't use `fix_up_namespace'.
	(fix_up_namespace): Remove function.
	* awk.h (lookup): Adjust declaration.

2019-01-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (qualify_name): Don't qualify a name if it's
	a parameter.

2019-01-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): Use qualify_name for array subscript
	expressions. Fixes the last leak in the test suite.
	* awk.h (is_all_upper): Declare.
	* symbol.c (is_all_upper): Remove static.
	* awkgram.y (is_all_upper): Remove.
	(Grammar): Clean up `#if 0' code.

2019-01-20         Arnold D. Robbins     <arnold@skeeve.com>

	Restore functionality.

	* awkgram.y (qualify_name): Remove `is_var' param, always check
	for all upper case. Adjust all calls.
	(Grammar): Do qualify_name for function calls also.

2019-01-19         Arnold D. Robbins     <arnold@skeeve.com>

	Continue fixing memory leaks.

	* awk.h (set_current_namespace): Declare function.
	* awkgram.y: Change all assignments of current_namespace to calls
	to set_current_namespace.
	(is_all_upper, qualify_name): New functions.
	(in_function): Change type to bool, and fix usages.
	(Grammar): Use qualify_name on variables and function names.
	* main.c: Change all assignments of current_namespace to calls
	to set_current_namespace.
	(set_current_namespace): New function.
	* profile.c (pp_namespace): Don't free old current_namespace. Add
	comment explaining why.

2019-01-18         Arnold D. Robbins     <arnold@skeeve.com>

	Start fixing memory leaks related to namespaces.

	* awkgram.y (Grammar): At simple_variable -> NAME, qualify names
	before lookup/install.
	(next_sourcefile): Check if need to free current_namespace before
	assigning to it.
	(yylex): Fix length of string to be dup'ed before returning
	NAME or FUNC_CALL.
	(set_namespace): Always free ns->lextok, adjust memory allocations
	appropriately.
	* main.c (main): Check if need to free current_namespace before
	assigning to it.
	* profile.c (pp_namespace): Ditto. (This may not be necessary.)

2019-01-18         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (do_set_var): Add comments before calls to assoc_set.
	* interpret.h (r_interpret): For Op_sub_array, deref the subscript
	appropriately. Thanks to Andy Schorr for the catch.

2019-01-15         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (asort_actual): Use assoc_set in 2 places.
	* awk.h (assoc_set): Improve leading comment.
	* debug.c (do_set_var): Use assoc_set in 2 places.
	* field.c (set_element, update_PROCINFO_str, update_PROCINFO_num):
	Use assoc_set in each.
	* gawkapi.c (api_set_array_element): Use assoc_set.
	* interpret.h (r_interpret): Use assoc_set.
	* main.c (init_args, load_environ, load_procinfo_argv):
	Use assoc_set in each.
	* mpfr.c (do_mpfr_intdiv): Use assoc_set in 2 places.
	* str_array.c (str_lookup): Fix leading comment.
	* symbol.c (install): Use assoc_set.

2019-01-15         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* builtin.c (do_match, do_intdiv): Remove unused `sub' and `lhs'
	variables, since assoc_set is now doing all of the work.

2019-01-15         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* awk.h (assoc_set): Move the definition lower down because it
	needs to be after unref is declared.
	* builtin.c (do_match): Use assoc_set in 3 places.
	(do_intdiv): Use assoc_set in 2 places.
	(do_typeof): Use assoc_set in 2 places.

2019-01-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* awk.h (assoc_set): Add new inline function to set an array element
	to eliminate code duplication and reduce the chance of memory leaks.

2019-01-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* builtin.c (do_typeof): Fix memory leak when populating the
	optional array, and make sure to call the astore method.

2019-01-14         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_intdiv): Add unref of subscripts.
	* mpfr.c (do_mpfr_intdiv): Ditto.
	Thanks to Andy Schorr for noticing.

2019-01-09         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* awkgram.y (tokentab): Indicate that typeof may take 2 arguments.
	(snode): Add support for typeof's optional 2nd array argument.
	* builtin.c (do_typeof): Add support for optional 2nd array arg,
	returning flag info for scalars and backend array type for arrays.

2019-01-09         John E. Malmberg      <wb8tyw@qsl.net>

	* awk.h: For non GCC, have __attribute__ definition match
	support/regex_internal.h exactly.

2019-01-08         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h (r_interpret): For a translatable string, only copy
	the gettext return value if it's different from the original.
	Otherwise, use the original.

2019-01-07         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	Use a struct instead of an array to contain the array methods
	for improved code clarity and flexibility.

	* awk.h (array_funcs_t): Define new struct to contain the array
	methods.
	(NODE): Change type of array_funcs (sub.nodep.l.lp) from `afunc_t *'
	to `const array_funcs_t *' (from a pointer to an array of function
	methods to a pointer to a struct containing the methods).
	(a*_ind): Remove obsolete method array index defines.
	(a*): Redefine array methods to use struct members instead of 
	array elements.
	(str_array_func, cint_array_func, int_array_func): Change type
	from array of afunc_t to 'const array_funcs_t'.
	(register_array_func): Remove global declaration, since this function
	is called only inside array.c.
	* array.c (null_array_func): Change from array of methods to a struct.
	(array_types): Now an array of pointers to array_funcs_t.
	(AFUNC): Remove obsolete macro.
	(register_array_func): Change scope to static, and change argument
	to a pointer to array_funcs_t instead of a pointer to an array of
	methods.
	(array_init): Modify calls to register_array_func to pass the address
	of the new array method structs.
	(make_array): Set array_funcs to & null_array_func.
	(null_lookup): Modify to use new array method structs.
	(assoc_list): Update cint check to use & cint_array_func.
	* str_array.c (str_array_func, env_array_func): Change from array of
	methods to an array_funcs_t struct.
	(env_clear, init_env_array): Set array_funcs to & env_array_func.
	* int_array.c (int_array_func): Change from array of methods to an
	array_funcs_t struct.
	* cint_array.c (cint_array_func): Ditto.
	(cint_lookup): When setting xn->array_funcs, must now use &.
	(cint_dump): Compare xn->array_funcs to & int_array_func.

2019-01-06         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* array.c (do_delete): If the array is now empty, reset it to the
	null implementation to avoid being locked into the backend
	optimization previously selected.

2019-01-06         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	Remove pointless alength macro/method that uses a needless
	function call indirection to access the table_size value.

	* awk.h (alength, alength_ind): Remove these defines, and also renumber
	the array_funcs items after that, and use the <blah>_ind define to
	define <blah> instead of repeating the hardcoded numeric value.
	(NUM_AFUNCS): Remove unused define.
	(assoc_length): Redefine to access table_size directly.
	(null_length): Remove prototype.
	* array.c (null_array_func): Remove null_length entry.
	(null_length): Remove obsolete function.
	* cint_array.c (cint_array_func): Remove null_length entry.
	* int_array.c (int_array_func): Remove null_length entry.
	* str_array.c (str_array_func, env_array_func): Remove null_length
	entry.
	* gawkapi.c (api_flatten_array_typed): Use the assoc_empty macro to
	check for an empty array instead of comparing table_size to 0.
	* symbol.c (lookup, check_param_names): Ditto.

2018-12-31         Arnold D. Robbins     <arnold@skeeve.com>

	Clean up namespace handling for the profiler.

	* awkgram.y (make_pp_namespace): Remove function, not needed.
	(set_namespace): Use estrdup to save the current namespace.
	* main.c (main): Before dumping the program, set current_namespace
	to awk_namespace.
	* profile.c (pprint): Use "awk" for comparison, not "awk::".
	(pp_namespace): Just print the name in the @namespace line.
	(adjust_namespace): Adjust for the fact that namespaces no longer
	have the trailing "::".

2018-12-30         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (check_qualified_name): Remove declaration.
	* awkgram.y (check_qualified_special): Renamed from
	check_qualified_name and made static.
	* profile.c (pprint): Improve comment on namespace list.

2018-12-21         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove -O only if .developing has 'debug' in it.

2018-12-18         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (distclean-local): Remove .deps directory.

2018-12-14         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated from GNULIB.

2018-12-12         Arnold D. Robbins     <arnold@skeeve.com>

	* TODO: Updated.

2018-12-12         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* configure.ac (AC_CHECK_FUNCS): Check for timegm.
	* builtin.c (mktime_tz): Remove function; we will use timegm instead.
	(do_mktime): Replace 'mktime_tz(& then, "UTC+0")' with 'timegm(& then)'.
	* protos.h (timegm): Add timegm proto on systems lacking it.
	* replace.c (timegm): Include missing_d/timegm.c if needed.

2018-12-12         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated some.

2018-12-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Add new Op_K_namespace opcode for pretty printing.
	* awkgram.y (namespace_chain): New variable, list of successive
	@namespace directives seen, for the pretty printer.
	(namespace_comment): Removed.
	(set_namespace): Takes comment as second argument, builds the chain.
	(mk_function, append_rule): Adjust to store the chain.
	* debug.c (print_ns_list): New function.
	(print_instruction): Adjust Op_rule and Op_func to use print_ns_list.
	Add case for Op_K_namespace.
	* eval.c (optable): Add entry for Op_K_namespace.
	(opcode2str, op2str): Edit / add leading comments, respectively.
	* profile.c (pp_namespace_list): New function.
	(pprint): Adjust code to call pp_namespace_list.

2018-12-06         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add -ggdb3 to CFLAGS if developing and remove
	-O2 from Makefile, extension/Makefile, and support/Makefile.
	* config.guess, config.sub: Updated from GNULIB.

2018-12-06         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (namespace_comment): New variable.
	(Grammar): Handle comments after @namespace statements.
	(mk_function): Add any comment onto the saved namespace.
	(append_rule): Ditto.
	* profile.c (pp_namespace): Add second argument for a comment.
	Adjust all calls.

2018-12-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (mk_program): Add in leading and trailing comments
	when program block is empty.

2018-11-29         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (first_rule, func_first): Remove unused variables.
	(Grammar): Simplify rule for range pattern.

2018-11-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (debug_print_comment): New macro and function.
	(load_library): Rework to not try to open the file if pretty printing.
	(append_rule): Adjust handling of interblock_comment.

2018-11-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): In rule for function, set interblock_comment.
	(mk_function): Hook interblock_comment onto fi->comment, merge it
	with the existing one first, if any. Append trailing_comment.

2018-11-26         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (platform_name): Add os390. Treat Cygwin and Mac OS X
	as POSIX, per discussion with the dev team.

	Unrelated:

	* profile.c (print_comment): Indent for chained comment.
	* awkgram.y (load_library): Return early if just pretty printing.
	(yylex): Fix handling of ?: and allow_newline etc.

2018-11-25         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (platform_name): New function returning platform name.
	(load_procinfo): Use `platform_name()' to add "platform" element.
	Thanks to Eli Zaretskii for the suggestion.
	* NEWS: Updated with info about PROCINFO["platform"].

2018-11-25         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated from GNULIB.

2018-11-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (interblock_comment, pending_comment): New variables.
	(Grammar, mk_program, add_rule): Adjust to use them. Changes
	handle comments at the outermost level, between blocks and functions.

2018-11-24         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (arg_assign): Allow assigning strongly typed regexp
	constants to variables on the command line and with -v.
	Thanks to Peng Yu <pengyu.ut@gmail.com> for the report.

2018-11-17         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Updated to Bison 3.2.1.
	* NEWS: Updated.
	* Makefile.am (pc/Makefile.tst): Make it work for out-of-tree
	builds.  Thanks to `make distcheck' for the report.

2018-11-17         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated from GNULIB.

2018-11-11         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Improve output for -Z in the help.
2018-11-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (outer_comment): New variable.
	(Grammar): More changes. We now get the simple case of leading
	and trailing comments, but not all the cases.

2018-11-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (trailing_comment): New variable.
	(Grammar): For `action', append both trailing comments. This may
	change. For `statements', append the value of `trailing_comment'
	if set. At `statement := l_brace statements rbrace' save
	trailing_comment from r_brace.
	(make_braced_statements): Don't append the comment from r_brace
	to the statement list.

2018-10-30         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (NODE): New field: sub.nodep.x.cmnt, holds comment for
	expressions being pretty-printed.
	* awkgram.y (Grammar): For expression lists, save any comment
	that came after a comma in the list.
	* profile.c (pp_push): Accept a fourth argument which is any
	comment associated with the expression. Either it's there or
	it's NULL. Save it in the pp_comment field of the node being pushed.
	(tabs, tabs_len, check_indent_level): Made into static globals.
	(pprint): Adjust all calls to pp_push(). Fix parenthesization
	for casts in string lengthes when indenting.
	(pp_list): If a popped item has a comment, include it and the
	following indentation in the formatted result.

2018-10-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (include_source): Add second parameter to return
	SRCFILE pointer.
	(Grammar): For @include, save the comment for later dumping
	along with the list of include files.
	(make_include_comment): Removed. No longer used.
	* profile.c: Update copyright year.
	(print_include_list): New function.
	(dump_prog): Call it.

2018-10-24         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Improve output for -Y and add -Z in the help.

2018-10-23         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated from GNULIB.

2018-10-20         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (SRCFILE): Add comment field for comments on @load statements.
	* awkgram.y (include_source): Type change to boolean.
	(load_library): Type change to boolean, additiona parameter to
	bring the SRCFILE struct up to where we can add the comment into it.
	(make_include_comment): New function. Not used yet.
	(Grammar): Add comment for @load statements. Start on preserving
	@include statements and their comments for eventual inclusion
	into the pretty-printed code.
	* profile.c (print_lib_list): Made a little smarter about printing
	the header and indentation. Print the comment if there is one.

2018-10-17         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (commenttype): Add FOR_COMMENT.
	* awkgram.y (Grammar): Handle all the opt_nls cases in
	regular for statements.
	* debug.c (print_instruction): Print the comments in Op_K_for.
	* profile.c (pprint): Handle printing comments.

2018-10-17         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated.
	* awkgram.y (Grammar): Distinguish `print' and `print $0' in
	what gets profiled / pretty-printed.
	* profile.c (pprint): For case and default, add final newline
	if there is no comment to print.

2018-10-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): Improve comment handling for many plain
	statements. Improve handling for case and default.
	Handle comments in `for (iggy in foo)' loops.
	(yylex): After a colon, only allow newline if was part of ?:.
	(merge_comments): Improve coding so we don't get two newlines
	at the end of a merged comment.
	* debug.c (print_instruction): Handle comments for case and default.
	Simplify printing of comments.
	* profile.c (pprint): Handle comments for case and default.
	Remove compiler warning in Op_and/Op_or handling.

2018-10-14         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): Add comment handling for do...while.
	Regularize comments about `else ...'.
	* debug.c (print_instruction): Improve handling of comments for
	do-while and switch, and in general.
	* profile.c (pprint): Revise for do...while.

2018-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (make_braced_statements): New function.
	(Grammar): Use it in the right places instead of inline code.
	* debug.c (print_instruction): For Op_comment, fix type string.
	* profile.c (pprint): Move tabs and tabs_len to top of function.
	For Op_and and Op_or, handle comments.  Use new check_indent_level
	for Op_and, Op_or and Op_cond_exp.

2018-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_instruction): For Op_comment, use print_func
	instead of fprintf to print the comment type.

2018-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): For statement -> { statements }, fix comment
	handling.  For `if' statement add comment support.
	* profile.c (pp_print): Print comments associated with `if' and `else'.

2018-10-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (Grammar): Fix handling of empty statement (just a semi-
	colon).
	(merge_comments): If no chained comment and no second comment,
	just return early.

2018-10-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (enum commenttype): New enum.
	(NODE): Add it to sub.val.
	(EOL_COMMENT, FULL_COMMENT): Replaced with above enum values.
	* awkgram.y (Grammar): Finish up handling comments in function headers
	and bodies. Get trailing comments at end of program
	(get_comment): When doing comments, if we got EOF, push it back so that
	multiple comments get merged together.
	(merge_comments): Allow second parameter to be NULL.
	* profile.c (pp_print): Change to use above enum everywhere. For
	Op_K_print_rec produce plain `print' instead of `print $0'. Handle
	comments in ?:. Handle printing function comments.
	(print_comment): Simplify `after_newline' assignment.  Add assertion
	that chaining is only two deep.

2018-10-06         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (action): Improve handling of comments attached
	to braces. Helps with function bodies.

2018-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (merge_comments): Change return type to void. Adjust calls.
	(Grammar): For action, pull comments out of braces and stick
	into the list. For function_prologue, get comments from parameters
	and ending newline, merge, and save.  Wherever nls and opt_nls
	are used, be sure to pass their values up via $$. For various
	cases that can be empty, explicitly set $$ = NULL.
	* profile.c (pprint): Get switch working.  Get ?: working.
	(print_comment): Print any chained comment.
	(pp_func): Start revising.

2018-10-03         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Range expressions, enable comment stuff.
	Switch statement: start on comment handling.

2018-10-01         Nelson H.F. Beebe     <beebe@math.utah.edu>

	* custom.h (__builtin_expect): Define for non-GNU compilers.

2018-09-27         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* mpfr.c (force_mpnum): Check that base is 10 also before
	computing MPG integer.  Found based on bug report from
	Luu Vinh Phuc <phuclv90@gmail.com>.

2018-09-26         Arnold D. Robbins     <arnold@skeeve.com>

	Add more lint checks.

	* awk.h (POP_ARRAY): Add boolean parameter to check for untyped
	value and include lint warning.
	* interpret.h (r_interpret): Adjust all calls to POP_ARRAY.
	* field.c (do_split): Improve lint warning text for empty
	third argument.
	* re.c (make_regexp): Add lint check for '\0' in contents of
	regexp to be matched (dynamic or otherwise).

2018-09-23         Steven Packard        <spackard1@bloomberg.net>

	* awk.h: Add `#if !defined(__SUNPRO_C)' around check for non-ANSI
	compilers.  Needed for some Solaris systems.

2018-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (INSTRUCTION): Add comment field to carry
	comment around during parsing.
	* awkgram.y (merge_comments): New function.
	(split_comment, check_comment, comment, prior_comment,
	comment_to_save, program_comment, function_comment,
	block_comment): Removed.
	(grammar): Remove old code and start passing the comment
	up via yylval and the newlines in the grammar.

2018-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Undo change of 2016-11-28 to make switch
	head a separate production, in preparation for revamping
	comment handling.

2018-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): Handle backslash at end of
	input string. Thanks to Anatoly Trosinenko
	<anatoly.trosinenko@gmail.com> for the report.
	Also, improve the error message when compilation of
	the regexp fails.

2018-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (fork_and_open_slave_pty): Move an errant close brace
	inside the #endif so that gawk will compile on AIX. Thanks to
	Fredrik Laurin <fredrik_laurin@yahoo.se> for the report.

2018-09-18         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Fix typo in gettext version.

	Unrelated:

	* field.c (get_field): Move lint check for field access in an
	END rule to top level, make wording more general.
	* builtin.c (do_print_rec): Restore check before calling get_field()
	and add do_lint to the condition.

	Unrelated:

	* field.c (set_NF): Add lint warning if decrementing NF, which
	doesn't work on older Unix awks.

	Unrelated:

	* config.rpath: Sync to GNULIB.

2018-09-16  gettextize  <bug-gnu-gettext@gnu.org>

	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump to 0.19.8.
	* ABOUT-NLS, config.rpath: Updated by gettext 0.19.8.1.

2018-09-16         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (get_field): Add lint check if accessing $0 inside
	an END rule, print a "may not be portable" warning.
	* builtin.c (do_print_rec): Call get_field() unconditionally
	in order to do lint check.

	Unrelated:

	* awkgram.c, command.c: Updated to Bison 3.1.
	* NEWS: Updated.

	Unrelated:

	* Makefile.in, aclocal.m4, configure: Regenerated, using
	Automake 1.16.1.

	Unrelated:

	* gettext.h: Synced with that from Gettext 0.19.8.1.

2018-09-14         Adrian Bunk           <bunk@debian.org>

	* awk.h (init_debug, debug_prog): Move prototypes to here from ...
	* main.c: ... here.
	Thanks to Michael Tautschnig for noticing the type mismatch.

2018-09-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y, debug.c, ext.c, gawkapi.c, gawkapi.h,
	io.c: Remove unneeded \n in calls to warning(), fatal(),
	and lintwarn().
	* config.guess, config.sub: Updated from GNULIB.

2018-08-24         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated w.r.t. GNULIB regex routines.
	* config.sub: Updated from GNULIB.

2018-08-17         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated from GNULIB.

2018-08-10         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated from GNULIB.

2018-08-05         John E. Malmberg      <wb8tyw@qsl.net>

	* custom.h: Define macros needed for building with gnu regex.

2018-08-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Add lint warning upon encountering escaped
	physical newlines in a string.
	* node.c (make_str_node): Ditto.

2018-08-01         John E. Malmberg      <wb8tyw@qsl.net>

	* custom.h: Include fp.h on OpenVMS.
	Workaround for bug in math.h missing some declarations.

2018-07-31         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h (unfield): Add a call to force_string() on
	new value. See test/assignnumfield.awk. Thanks to
	Ralph Corderoy <ralph@inputplus.co.uk> for the bug report.

2018-07-31         Arnold D. Robbins     <arnold@skeeve.com>

	Handle newlines in -v and fix \-<newline>. Thanks to
	Samy Mahmoudi <samy.mahmoudi@gmail.com> for the report.

	* awk.h [ELIDE_BACK_NL]: New constant.
	* awkgram.y (yylex): Disallow any physical newlines in a string
	even if escaped, in POSIX mode.
	* main.c (arg_assign): In POSIX mode disallow physical newline
	in a -v value.  Otherwise call make_str_node() with ELIDE_BACK_NL.
	* node.c (make_str_node): Handle ELIDE_BACK_NL.

2018-07-31         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (cmp_strings): Preserve value of lmin so it can be passed
	to memcmp() if IGNORECASE comparison failed. Thanks to
	M. Rashid Zamani <rashid.z@gmail.com> for the report.

2018-07-27         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): Add warnings for unknown escape sequences,
	similar to what we already do for strings.
	* awkgram.y: Add lint warning about concatenation as target
	of `>' redirection.  Always use Op_parens so that
	print "foo" > ("foo" 1) does not warn.

2018-07-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (_GNU_SOURCE): Don't define it here, it's already
	done in config.h.

2018-07-13         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_nan_inf): New function to generate +nan, -nan,
	+inf, -inf, so that gawk output for NaN and INF always has a sign.
	Handles regular and MPFR.
	(out_of_range): New function to check if a value is out of range,
	both regular and MPFR.
	(format_tree): Use them in out of range calculation.  Check for out
	of range in floating point formats also. Allow new *undocumented*
	'P' flag to not do out of range formantting. Used mainly for
	the test program.
	* awk.h (out_of_range, format_nan_inf): Declare functions.
	* mpfr.c (mpg_format_val): Check for out of range and format the
	the result appropriately if so.
	* node.c (r_format_val): Ditto.

2018-06-27         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated from GNULIB.

2018-06-22         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* node.c (r_force_number): If strtod returns ERANGE, accept the
	value as being numeric instead of forcing it to zero. The impact
	is that huge string values that overflow IEEE 754 limits will now
	be converted to inf or -inf instead of 0. Thanks to Daniel
	Pettet for reporting this issue.

2018-06-17         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a corner case with EPIPE to stdout/stderr.
	Thanks to Peng Yu for the report.

	* io.c (close_io): Add new parameter for indicating EPIPE happened,
	update the code to set it if so.
	* awk.h (close_io): Revise declaration.
	* debug.c (close_all): Change call to close_io().
	* interpret.h (interpret): For Op_atexit, if got an EPIPE, call
	die_via_sigpipe().

2018-05-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (add_lint): For no-effect case, also check for
	Op_push_i.  Makes statements consisting of a single constant
	trigger the warning.

2018-05-23         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated from GNULIB.

2018-05-14         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Minor edits.

2018-05-13         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Update from GNULIB.

2018-05-03         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (pc/Makefile.tst): New target.
	(dist-hook): Now depends upon pc/Makefile.tst.

2018-04-30         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h [dl_load_func]: Minor improvement in version mismatch
	message as suggested by Manuel Collado
	<m-collado@users.sourceforge.net>.

2018-04-18         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated from GNULIB.

2018-04-14         Manuel Collado       <m-collado@users.sourceforge.net>

	* field.c (reset_record): Disable fieldwidth from API
	get_record() if $0 is explicitly assigned a new value.

2018-04-02         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub, install-sh: Updated from GNULIB.

2018-04-01         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a nasty MPFR bug in r_dupnode. If the value being copied
	is MPFN / MPFR, copy those bits over too. Thanks to
	Noah Dean <N.Dean@gaminglabs.com> for the report.

	* node.c (r_dupnode): Check for MPFN / MPFR and copy the bits
	over as needed.

	Unrelated:

	* interpret.h (UNFIELD): Turn into an inline function and
	let UNFIELD macro call it, allows stepping in with a debugger.
	(unfield): Function holding former body of UNFIELD macro.

2018-03-26         Arnold D. Robbins     <arnold@skeeve.com>

	Remove the tail recursion optimization. It's fundamentally
	broken, in the case where a local var becomes a parameter.
	Thanks to Denis Shirokov <cosmogen@gmail.com> for the report.
	See test/tailrecurse.awk.

	* awk.h [num_tail_calls, tail_call]: Remove definitions.
	* awkgram.y (grammar, mk_function): Remove code related to
	the tail recursion optimization.
	* eval.c (dump_fcall_stack): Adjust dumping code since no longer
	looping through tail call recursion.
	(setup_frame): Remove code related to the tail recursion optimization.
	(init_interpret): Ditto.

2018-03-22         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Check for %a support in system printf.
	* builtin.c (format_tree): Add support for %a and %A, including
	a lint warning.
	* NEWS: Add a note about %a support.

2018-03-13         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c, nonposix.h: Update copyright year.

2018-03-11         Arnold D. Robbins     <arnold@skeeve.com>

	* compile, config.guess, config.sub, configure.ac, depcomp,
	install-sh, mkinstalldirs: Updated.

2018-03-05         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h [PUSH_BINDING, POP_BINDING]: Moved to ...
	* debug.c: here.
	* awkgram.y (yylex): Make do_etoa_init into a boolean.
	* io.c (rs1scan): Make found into a boolean.

2018-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.2.1: Release tar ball made.

2018-02-25         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated.

2018-02-23         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Restore checking for PPC Macintosh before
	checking for MPFR. See README_d/README.macosx for info.

2018-02-21         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove checking for PPC Macintosh before
	checking for MPFR. Installing a newer compiler on that
	system allows things to work.

2018-02-19         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h, io.c, msg.c: Update copyright year.

2018-02-10         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c, msg.c: Add a call to fflush(NULL) before each call
	to abort(), since GLIBC 2.27 doesn't necessarily flush before
	aborting.  Thanks to Nelson H.F. Beebe for the report.

2018-02-09         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (socketopen): Rearrange assigning the flags to use
	AI_ADDRCONFIG only if family is AF_UNSPEC. Thanks to
	Houder <houder@xs4all.nl> for the report and initial
	code suggestion.

2018-02-07         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	Print +"01" should print "1", not "01".
	* interpret.h (Op_unary_plus): Need to make a new number node that does
	not contain the original string representation. The logic is copied
	from Op_unary_minus.
	* mpfr.c (mpg_interpret): Add new case for Op_unary_plus based on
	the Op_unary_minus logic. We need a fresh number node that does not
	contain the string.

2018-01-28         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated.

2018-01-25         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Add explanatory comment about O_APPEND stuff.
	* NEWS: Updated.

2018-01-22         Arnold D. Robbins     <arnold@skeeve.com>

	Fix the inplace tests on *BSD systems.

	* main.c (main): Add O_APPEND flag to fileno(stderr).

2018-01-17         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_isarray): Check that tmp is Node_var
	before calling DEREF. Thanks to Denis Shirokov
	<cosmogen@gmail.com> for the report.

2018-01-15         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Small typo fix.
	* config.sub: Updated.
	* io.c (fork_and_open_slave_pty): Rationalize down to one
	function with two bodies.
	(set_slave_pty_attributes, push_pty_line_disciplines): Move
	into #ifdef for TERMIOS_H. Helps out with VMS compiling.

2018-01-12         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Remove extraneous '*' on parameters of
	type awk_ext_id. Thanks to Andrew Schorr for the report.

2018-01-11         Arnold D. Robbins     <arnold@skeeve.com>

	* compile, config.guess, config.rpath, config.sub,
	depcomp: Updated from GNULIB.

2018-01-08         John E. Malmberg      <wb8tyw@qsl.net>

	* io.c (set_slave_pty_attributes): Currently no termios on VMS.
	(set_slave_pty_attributes): No fork on VMS.

2018-01-04         Arnold D. Robbins     <arnold@skeeve.com>

	Refactor handling of slave pty. On AIX and HP-UX open
	slave in the child. Otherwise open slave in the parent
	before forking (restoring code mostly from 4.1.3). Thanks
	to Andrew Schorr for the bug report.

	* io.c (fork_and_open_slave_pty): New routine. Two versions.
	(set_slave_pty_attributes): New routine. Common code used by
	both versions of fork_and_open_slave_pty.
	(push_pty_line_disciplines): New routine. Common code used by
	both versions of fork_and_open_slave_pty.
	(two_way_open): Call fork_and_open_slave_pty instead of
	doing it inline.

2018-01-03         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (UPDATE_YEAR): Move to 2018. Revise copyright year.
	* NEWS: Bring up to date.

2018-01-02         Arnold D. Robbins     <arnold@skeeve.com>

	If ROUNDMODE changes, cause cached string conversions
	to become invalid. Thanks to Nethox <nethox@gmail.com>
	for the report. Day 1 bug from 4.1.0 release.

	In all the below files, bump copyright year, too.

	* array.c (value_info): Include strndmode in the output.
	* awk.h (NODE): New member, strndmode.
	(MPFR_round_mode): Add extern declaration.
	(force_string_fmt): Check s->strnmode against MPFR_round_mode.
	* awkgram.y (set_profile_text): Set n->strndmode to MPFR_round_mode.
	* builtin.c (do_print): Remove tests and just call force_string_fmt.
	* field.c (set_record): Set n->strndmode to MPFR_round_mode.
	* gawkapi.c (api_sym_update_scalar): Set r->strndmode to
	MPFR_round_mode.
	* interpret.h (r_interpret): For Op_assign_concat, set t1->strndmode
	to MPFR_round_mode.
	* mpfr.c (MPFR_round_mode): Define and initialize.
	(mpfr_format_val): Set s->strndmode to MPFR_round_mode.
	(set_ROUNDMODE): Update MPFR_round_mode when ROUNDMODE changes
	successfully.
	* node.c (r_format_val): Set s->strndmode to MPFR_round_mode.
	(make_str_node): Set r->strndmode to MPFR_round_mode.
	* str_array.c (str_kilobytes): Update a comment.
	* symbol.c (check_param_names): Set n.strndmode to MPFR_round_mode.

2017-12-24         Arnold D. Robbins     <arnold@skeeve.com>

	Avoid some compiler warnings. Thanks to Michal Jaegermann
	<michal.jnn@gmail.com> for the report.

	* builtin.c (do_strftime): Initialize save.
	(do_dcgetttext): Initialize save and save2.
	(do_dcngettext): Ditto.
	(do_bindtextdomain): Initialize save and save1.

	Unrelated:

	* main.c (optlist): Make 'L' option's argument optional, to
	match --lint. Thanks to Manuel Collado <mcollado2011@gmail.com>
	for the report.

2017-12-22         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub, depcomp, install-sh: Updated
	from GNULIB.

2017-12-20         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add --enable-versioned-dir option for a
	directory with API version in it to hold extensions.

2017-12-19         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove x's from `test "x$something" = "xyes"
	kinds of things. With correct quoting, the x isn't needed.
	(DYNAMIC): Remove use of -Wl,-export-dynamic on Linux
	and FreeBSD. It was needed for old-style extensions, which are
	no longer supported.

2017-12-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: For '!' optimization on a string constant, don't
	apply the optimization if it's a translatable string. Thanks
	to Jeremy Feusi <jeremy@feusi.co> for the report.

2017-11-25         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* debug.c (do_set_var): As in interpret.h (Op_store_field), we should
	call the assign function before unref to give it a chance to copy
	any non-malloced $n string values before freeing $0.

2017-11-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* mpfr.c (get_rnd_mode): Fix MPFR_RNDA comment.

2017-11-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	Fix corruption when $0 is reassigned while other NODEs have open
	references to $n. Thanks to Eric Pruitt <eric.pruitt@gmail.com> for
	the bug report.

	* field.c (purge_record): For each $n field variable, if valref > 1
	and it has not already been malloced, make a copy of the string, since
	$0 is about to be reset.
	* interpret.h (Op_store_field): We must call the assign function
	before unref, since we must copy any non-malloced $n string values
	before freeing $0.

2017-11-09         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Add a note to not post bugs in comp.lang.awk.
	So there.

2017-11-08         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (AWK_NUMBER_TYPE): Move this enum out to the
	top level so that it works correctly with C++.

2017-10-24         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated with info about OS/2.

2017-10-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: For string concatenation, don't fold constants
	if one or the other is translatable. Thanks to Harald van Dijk
	<harald@gigawatt.nl> for the report.

2017-10-21  KO Myung-Hun <komh78@gmail.com>

	* nonposix.h [__KLIBC__]: Include dlfcn.h, declare os2_dlsym, and
	redirect dlsym to os2_dlsym. Declare os2_fixdllname.  Declare
	os2_dlopen and redirect dlopen to os2_dlopen.
	* io.h (find_source) [__EMX__]: Truncate extension file basename
	to 8 characters.

2017-10-19         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.2.0: Release tar ball made.

2017-10-17         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* NEWS: Actually, isarray is not deprecated in this release.
	* builtin.c (do_isarray): Remove lint warning deprecating isarray.

2017-10-14         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (do_split): Simplify the lint warnings.
	Based on suggested code by Eric Pruitt <eric.pruitt@gmail.com>.

	Unrelated:

	* awkgram.y (check_funcs): Remove the REALLYMEAN ifdef and
	simplify the lint checking code for function defined but not
	called or called but not defined.

2017-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	Assume a more C99 environment:

	* awk.h: Assume we have limits.h, stdarg.h and stdbool.h.
	* configure.ac: Remove checks for limits.h and stdarg.h.

2017-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove --with-whiny-user-strftime option.
	* NEWS: Updated.
	* ChangeLog.0: Fix a typo. :-)

2017-10-08         Arnold D. Robbins     <arnold@skeeve.com>

	* command.y: Fix the FSF's address.

2017-10-08         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Rationalized with respect to stuff on the API.
	Also rationalized with respect to the pretty printer changes.

2017-10-04         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* README: Fix grammar by removing a stray word.

2017-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Add a note about OS/2 not working.

2017-10-02         Arnold D. Robbins     <arnold@skeeve.com>

	Undo change of 2014-09-07:

	* configure.ac: Remove the undocumented option to enable locale
	letters in identifiers.
	* awkgram.y (is_alpha): Remove related code.

2017-10-02         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated.

2017-09-28         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (devopen): Move declaration of `cp' to where it's first used.

2017-09-18         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Update required version of texinfo.tex.
	* compile, config.guess, config.sub, depcomp: Updated.

2017-09-17         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Small changes to make it usable with C++.

2017-09-13         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (command.c): Don't need the dependency on awkgram.c
	anymore.
	* bisonfix.awk: Removed.
	* README: Revised to describe use of Bison exclusively.

2017-09-13         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* Makefile.am (awkgram.c): Use -o option to bison. Get rid of
	messing with y.tab.h, that was obsolete.
	(EXTRA_DIST): Don't need bisonfix.awk anymore.

2017-09-12         Petr Ovtchenkov       <ptr@void-ptr.info>
		   Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* Makefile.am (command.c): Make dependant on awkgram.c so
	that bison is run serially with make -j.  Use -o option so
	that we no longer need bisonfix.awk in this rule.

2017-08-28         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h (r_interpret): Add some casts to avoid warning
	messages in printf statements.

	Unrelated:

	* configure.ac: Add check for gai_strerror.
	* io.c (socketopen): Use gai_strerror to add more information
	if getaddrinfo fails.

2017-08-25         Pat Rankin            <r.pat.rankin@gmail.com>

	* builtin.c (TYPE_MINIMUM): Use type uintmax_t for the calculation,
	deferring the cast to the target type until the final result.

2017-08-27         Juan Manuel Guerrero  <juan.guerrero@gmx.de>

	* mbsupport.h [__DJGPP_]: Provide multi-byte specific declarations
	and definitions for DJGPP.

2017-08-23         Arnold D. Robbins     <arnold@skeeve.com>

	* README.git: Minor edits to make build steps clearer.

2017-08-21         Daniel Richard G.     <skunk@iSKUNK.ORG>

	* awk.h (c_func): Renamed to c_function to avoid conflict.
	with z/OS headers.
	* ext.c, interpret.h: Ditto.
	* configure: Regenerated after update to m4/arch.m4.

2017-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (do_set_var): Fix typos in error messages.
	Thanks to Jean-Philippe Guerard
	<jean-philippe.guerard@xn--tigreray-i1a.org> for the report.

2017-08-17         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (rebuild_record): Set new fields valref to 1 if
	original field's valref was > 1. Update the comment. Found
	by running chem.
	* mpfr.c (do_mpfr_compl): Fix typo in warning message.
	Thanks to Jean-Philippe Guerard
	<jean-philippe.guerard@xn--tigreray-i1a.org> for the report.
	* NEWS: Mention the Italian translation of the manual.

2017-08-16         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (assign_number): Clean up the code a bit.
	(api_get_mpfr, api_get_mpz): Add return NULL in non-MPFR case
	to avoid compiler warnings.

2017-08-16         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Update from GNULIB.
	* NEWS, README: Updated in preparation for release.

2017-08-16         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (assign_number): Add 'ifdef HAVE_MPFR' tests to get this
	to build in the absence of MPFR.

2017-08-13         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (gawk_api_major_version): Reset to 2 after merging
	in feature/api-mpfr branch.
	* NEWS: `intdiv' is not built-in; remove the entry for up and update
	numbering. Add note about API supporting GMP and MPFR values.

2017-08-09         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (check_mpfr_versions): Define differently based on if
	MPFR version macro is defined. Enhance body to use do/while(0).
	(dl_load): Call check_mpfr_versions unconditionally.

2017-08-09         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Add URL for Bug reporting info to the help message.

	Unrelated:

	* str_array.c (str_lookup): Make a copy of the string if it
	came from Nnull_string or a null field.  Thanks to
	Daniel Pettet for the report.

2017-08-04         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c, awk.h, awkgram.y, builtin.c, cint_array.c,
	cmd.h, debug.c, eval.c, ext.c, field.c, gawkapi.c, gawkmisc.c,
	gettext.h, int_array.c, main.c, mpfr.c, msg.c, node.c, profile.c,
	re.c, str_array.c, symbol.c: Update copyright years.

2017-08-04         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, mkinstalldirs: Updated from GNULIB.

2017-08-01         Juan Manuel Guerrero  <juan.guerrero@gmx.de>

	Bring DJGPP support up to speed.

	* awk.h: Add DJGPP in #if for include of nonposix.h
	* nonposix.h (btowc, putwc): Add declarations for DJGPP.

2017-07-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (validate_qualified_name): Return type back to bool.
	* awkgram.y (validate_qualified_name): Return type back to bool.
	(lookup_builtin): Make allowances for `awk::' prefix on name.
	* interpret.h (r_interpret): For indirect call, always pass true
	for do_qualify argument of lookup.
	* main.c (main): Make note of errors in -v values, use this
	to exit failure if any happen.  Only change current_namespace
	to 'awk::' if doing pretty printing.
	(arg_assign): If validate_qualified name returns false, error out.

2017-07-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (set_namespace): Change return type void, adjust
	all return statements.
	[@namespace]: Don't YYABORT on bad namespace so that we can check
	the rest of the program.
	(validate_qualified_name): Check traditional / posix first. Return
	after printing an error message; we don't want to print multiple
	messages for the same identifer.
	* interpret.h (r_interpret): For indirect call, set do_qualify
	parameter of lookup based on presence of a colon.

2017-07-20         Arnold D. Robbins     <arnold@skeeve.com>

	Make qualified names work with -v and command-line assignments.

	* awk.h (validate_qualified_name, check_qualified_name): Declare.
	* awkgram.y (validate_qualified_name): No longer static.
	(check_qualified_name): Ditto.
	* main.c (arg_assign): Allow colons in identifiers. If not a
	bad identifier, call validate_qualified_name and instead of
	check_special use check_qualified_name.

2017-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	Allow identifiers that are gawk extensions to be used as plain
	identifiers outside the "awk" namespace. Make the real
	builtins available via awk::builtin_name(). Standard awk reserved
	words and builtin functions remain reserved.

	* awk.h (getfname): Add boolean parameter to prepend namespace
	or not.
	* awkgram.y (check_qualified_name): New function. Enforces that
	standard awk reserved words and functions aren't allowed, and
	allows awk::gawk_extension from non-"awk" namespace.
	[direct_func_call]: Always convert name to fully qualified.
	(getfname): Add boolean parameter to prepend namespace
	or not. Adjust code.
	(yylex): Separate out validation code from code building the
	NAME token.  Use check_qualified_name to decide if token is
	special instead of check_special.
	(validate_qualified_name): Just checks the form of the fully
	qualified name.
	* debug.c (print_instruction): Update call to getfname.
	* profile.c (pprint): Update call to getfname.

2017-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y [direct_func_call]: Save full variable name for
	indirect calls too.

2017-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y [non_post_simp_exp]: Merge LEX_BUILTIN and
	LEX_LENGTH expansions.
	(lookup_builtin): Move MPFR test to after test for sub builtin.

	* awkgram.y [non_post_simp_exp]: Unmerge LEX_BUILTIN and
	LEX_LENGTH expansions. This introduced a reduce/reduce
	conflict, and those are bad.  I don't know why I didn't
	notice this earlier. Sigh.

2017-07-15         Arnold D. Robbins     <arnold@skeeve.com>

	Revert change of 2016-07-24 that always runs the dfa
	matcher. Based on a bug report from Alexandre Oliva
	<lxoliva@fsfla.org>, DFA can cause gawk to hang, even
	in the C locale.

	* re.c (research): Don't use dfa if need_start is true.

2017-07-13         Arnold D. Robbins     <arnold@skeeve.com>

	More rationalization of the namespace code.

	* awk.h (is_valid_identifier): Declare.
	* awkgram.y (grammar: direct_func_call): Store the fully qualified
	name in the op code.
	(yylex): Disallow reserved words and functions as namespace name.
	(check_params): Small code edit
	(validate_qualified_name): Use is_lsetter.
	(set_namespace): Check for NULL pointer first! Use is_valid_identifier
	instead of inline code.  Disallow using reserved words as namespace
	names.
	* ext.c (is_valid_identifier): No longer static.
	(make_builtin): Check name and namespace against reserved words and
	fatal error if found.
	* gawkapi.c (ns_lookup): New function to look for variables
	in namespaces.
	(api_sym_lookup): Check namespace for validity and use ns_lookup.
	(api_sym_update): Ditto.
	* profile.c (pp_print): Correctly print full function name
	in a function call.

2017-07-11         Arnold D. Robbins     <arnold@skeeve.com>

	Continue adding namespace support to the extension API.

	* awk.h (make_builtin): Add leading name_space parameter.
	* ext.c (make_builtin): Add leading name_space parameter.
	Do the appropriate checking and building of a name before
	installing in the symbol table.
	* gawkapi.c (add_ext_func): Use name_space, not namespace.
	Check that the parameter isn't NULL.
	(api_sym_lookup, api_sym_update): Use name_space, not namespace.
	* gawkapi.h: Use name_space, not namespace, everywhere.

2017-07-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (is_letter): Add declaration.
	* ext.c (is_valid_identifier): New function.
	(make_builtin): Use is_valid_identifier instead of inline code.
	(is_letter): Moved from here ...
	* awkgram.y (is_letter): ... to here.
	(yylex): Use is_letter instead of a test.
	* command.y (yylex): Ditto.
	* main.c (arg_assign): Ditto.

2017-07-07         Arnold D. Robbins     <arnold@skeeve.com>

	Remove warnings from GCC 7.1 compilation.

	* awk.h (fatal_tag_valid): Change type to int.
	* awkgram.y (yylex): Set did_newline to true instead of using ++.
	* builtin.c (format_tree): Set lj to true instead of using ++.
	* cmd.h (pager_quit_tag_valid): Change type to int.
	* debug.c (pager_quit_tag_valid): Change type to int.
	(do_clear): Make bp_found an int, change uses.
	(do_run): Treat fatal_tag_valid as an int.
	* msg.c (fatal_tag_valid): Change type to int.

2017-07-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yyerror): Produce better diagnostics for source
	files that are not whole syntactic units.

	* gawkapi.c (api_sym_lookup, api_sym_update): Add namespace parameter.
	Currently unused.
	* gawkapi.h (api_sym_lookup, api_sym_update): Add namespace parameter.
	(api_sym_lookup_ns, api_sym_update_ns): New macros.
	(api_sym_lookup, api_sym_update): Adjust macro bodies.

2017-07-07         Arnold D. Robbins     <arnold@skeeve.com>

	* gawapi.h: Bring descriptive comments up to date, minor edits.
	* io.c: Add some initial comments to functions where they were missing.

2017-07-03         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h, gawkapi.c: Typo fixes in comments.

2017-07-01         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (install): Don't call fix_up_namespace if
	installing parameters.
	* profile.c (remove_namespace): Renamed to
	(adjust_namespace): Make smarter and add boolean parameter for
	if return was mallc'ed. Adjust calls.

2017-06-30         Arnold D. Robbins     <arnold@skeeve.com>

	Add namespace info into Op_Rule and Op_Func.
	Fix memory management problem.
	The changes temporarily break the test suite.

	* awk.h (MAX_INSTRUCTION_ALLOC): Increase to 4.
	(Op_K_namespace): Remove, not needed.
	* eval.c (optypetab): Remove Op_K_namespace.
	* awkgram.y (make_pp_namespace): New function.
	(yylex): For BEGIN etc, allocate 4 in the instruction.
	(install_func): Save namespace name for Op_rule.
	(append_rule): Save namespace name for Op_rule.
	* debug.c (print_instruction): Print namespace for Op_rule, Op_func.
	Remove Op_K_namespace.
	* profile.c (pp_namespace, remove_namespace): New functions.
	(pprint): Call `pp_namespace'. Use `remove_namespace' on variable
	names.
	(pp_func): Ditto on both.
	* symbol.c (lookup): Initialize `malloced' to false.
	(install): Ditto.

	Unbreak the test suite:

	* awk.h (namespace_changed): Declare new boolean variable.
	* awkgram.y (namespace_changed): Define new boolean variable.
	(set_namespace): Set it to true when the namespace is changed.
	* main.c (main): Set current_namespace to "awk::" for the pretty
	printer.
	* profile.c (pp_namespace): If namespace_changed is false, return.

2017-06-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h [ns_name]: Add macro in preparation for use.
	* debug.c (print_instruction): Add case for Op_K_namespace.
	Not really used yet.
	* symbol.c (fix_up_namespace): Bug fix to always allocate
	memory for a full name. Add boolean parameter to indicate
	if memory was malloc'ed or not.
	(lookup): Adjust call to fix_up_namespace and use make_str_node
	if the string was malloced.
	(install): Ditto.

2017-06-26         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Turn a tab into a space in AC_DEFINE(SUPPLY_INTDIV).

2017-06-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkmisc.c (xmalloc): Remove function now in support/xalloc.h.

2017-06-22         Arnold D. Robbins     <arnold@skeeve.com>

	Make pretty-printing include parentheses that were explicitly
	in the source code. Thanks to Hermann Peifer for the bug report.

	* awk.h (OPCODE): Add Op_parens.
	* awkgram.y [Grammar]: If pretty-printing, add Op_parens ot end of
	list for parenthesized expression.
	* eval.c (optypetab): Add Op_parens.
	* interpret.h (r_interpret): Ditto.
	* profile.c (pprint): Ditto.  For ?:, don't parenthesize it.
	(pp_parenthesize): If string starts with left paren, return early.
	(parenthesize): Don't call div_on_left_mul_on_right.
	(div_on_left_mul_on_right): Remove function.
	(pp_concat): Don't add parentheses if expressions already have them.
	* NEWS: Updated.

2017-06-21         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Replace malloc/memset combinations with calloc by using the new ezalloc
	macro.
	* awkgram.y (yyerror, do_add_srcfile, funcuse): Replace emalloc+memset
	with ezalloc.
	* cint_array.c (cint_lookup, cint_copy, tree_lookup, tree_copy,
	leaf_lookup, leaf_copy): Ditto.
	* command.y (mk_cmdarg): Ditto.
	* debug.c (add_item): Ditto.
	* eval.c (setup_frame): Ditto.
	* field.c (set_record): Ditto.
	* gawkapi.c (api_flatten_array_typed): Ditto.
	* int_array.c (int_copy, grow_int_table): Ditto.
	* io.c (init_awkpath, iop_alloc): Ditto.
	* node.c (str2wstr): Ditto.
	* re.c (make_regexp): Ditto.
	* str_array.c (str_copy, grow_table): Ditto.
	* symbol.c (make_params, new_context): Ditto.

2017-06-19         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (ezalloc): Add new macro to allocate memory initialized to zero.
	(ezalloc_real): New inline function to call calloc.
	* gawkapi.h (ezalloc): Add new API macro to allocate memory initialized
	to zero.

2017-06-18         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (mbc_char_count): Fix code to correctly traverse
	the string. Thanks to Hermann Peifer for the bug report.
	* config.guess, config.sub: Update to latest from GNULIB.
	* gettext.h: Pull in a few nice changes from GNULIB version.

2017-06-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (lookup): Add second parameter.
	* array.c (assoc_list): Adjust call to lookup.
	* awkgram.y (grammar, parms_shadow, install_function, variable):
	Ditto.
	* command.y [Grammar]: Ditto.
	* debug.c (find_symbol): Ditto.
	* ext.c (make_builtin): Ditto.
	* gawkapi.c (api_sym_lookup, api_sym_update): Ditto.
	* interpret.h (r_interpret): Ditto.
	* main.c (arg_assign): Ditto.
	(main): Reset current_namespace after parsing.
	* symbol.c (lookup): New second parameter, do_qualify. Use it
	to qualify names or not.
	(install): Call fix_up_namespace.
	(is_all_upper): New helper routine.
	(fix_up_namespace): New function.

2017-06-13         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (awk_namespace, current_namespace): Move to const char.
	(SRCFILE): Add namespace element.
	* awkgram.y (awk_namespace, current_namespace): Move to const char.
	(set_namespace): New function.
	[Grammer]: Call it.
	(tokentab): Add "namespace" entry.
	(include_source): Push the current namespace.
	(next_sourcefile): Pop the current namespace.
	(yylex): Add lint warning if a reserved word is used as a namespace
	name.
	(validate_qualified_name): Make it an error to use a reserved
	word as the second part of a fully qualified name.

2017-06-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (awk_namespace, current_namespace): Declare.
	(opcodeval): Add Op_K_namespace.
	* awkgram.y (awk_namespace, current_namespace): Define.
	(LEX_NAMESPACE): Add lexing and parsing of `@namespace directive'.
	(tokentab): Add "namespace" entry.
	(yylex): Check if first part of qualified identifier is
	a reserved word or function.
	* eval.c (optypetab): Add Op_K_namespace.

2017-06-06         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Allow :: in identifiers (the "NAME" token).
	Use validate_qualified_name to check it.
	(validate_qualified_name): New function.

2017-05-30         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (nextc): Force -e chunks to be syntactic units.
	Needed for namespaces to work correctly.

2017-05-30         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Mention PROCINFO["argv"].

2017-05-24         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (set_FIELDWIDTHS): Add check to protect against blank
	characters after a `:' skip separator. 
	Fix field number in error message, thanks to a bug report
	from Michal Jaegermann.

2017-05-23         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (set_FIELDWIDTHS): Simplify the logic and consistentify
	use of UINT_MAX.  Make sure that negative value after : is caught.

2017-05-23         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (fw_parse_field): Stop upon hitting the end of the
	record; this enables correct counting of the number of fields.
	(set_FIELDWIDTHS): Add `*' at end as meaning ``all the rest
	of the data on the line.'' Allow skip:* as well.
	* NEWS: Update information about FIELDWIDTHS.

2017-05-20         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (add_lint): Make ``no effect'' check smarter about
	reporting line numbers.

2017-05-01         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (nextc): Fix to change of 2017-04-24 such that
	@include works in multibyte locales. Thanks to Hermann
	Peifer for the bug report.

2017-04-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (make_regnode): Fix bug -- we should not set valref to 1
	when creating a node of type Node_regex, since valref is appropriate
	only for Node_val nodes. This fixes a bug introduced in commit
	687e6594. Also, add an assert to make it clear that this function
	supports only Node_regex and Node_dynregex.
	* awk.h (NODE): Restore sref to the `val' subportion, since it is not
	really needed for Node_regex, now that the bug in make_regnode has
	been fixed.
	(valref): Restore macro definition.

2017-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (NODE): Additional cleanups. Removed `aq' and `param_list'
	elements from various unions and removed 'nextp' and
	`a_opaque' defines. None of these were in use.
	Rework the comment for valref, per suggestion from
	Andrew Schorr.

2017-04-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (nextc): Adjust so that 3.1.x behavior is restored
	whereby --source arguments are concatenated. Thanks to
	"Neil R. Ormos" <ormos-gnulists17@ormos.org> for the report.

2017-04-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (NODE): Put the `val' subportion back the way it
	was and move valref (formerly sref) out of the unions
	entirely. This was the real problem. Rework the corresponding
	commentary.
	[valref]: Removed the macro definition.

2017-04-20         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Make letter case usage in the various
	AC_ARG_ENABLE messages consistent with the rest of configure
	output.
	(--disable-mpfr): Add this option to make it easier
	to check compiles without MPFR. Motivated by:
	* awk.h (NODE): Rearrange the layout of the 'val' subportion
	of the union to fix alignment problems when compiling without
	MPFR.  The problem only happened on 64-bit compiles, not
	32-bit compiles.

2017-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	Rename intdiv it intdiv0 and require enabling at configure time.

	* awkgram.y (tokentab): Bracket intdiv0 in #ifdef SUPPLY_INTDIV.
	(snode): Similar.
	* builtin.c (do_intdiv): Bracket in #ifdef SUPPLY_INTDIV.
	* mpfr.c (do_mpfr_intdiv): Bracket in #ifdef SUPPLY_INTDIV.
	* configure.ac: Add --enable-builtin-intdiv0 option. If enabled,
	also revise doc/gawktexi.in.

2017-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_intdiv): Use DEREF on the arguments.
	Thanks to Andrew Schorr for finding the problem.
	* mpfr.c (do_mpfr_intdiv): Return -1 if numerator or denominator
	are not valid numbers.  Unref various bits first.

2017-04-13         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (make_number_node): Simplify.
	* mpfr.c (mpg_node): Change parameter name to `flags'.

2017-04-12         Arnold D. Robbins     <arnold@skeeve.com>

	* mpfr.c (mpg_format_val): Set STRCUR flag when we're done.
	Fixes a memory leak. Thanks to valgrind for the report.

	* builtin.c (do_dcgettext): Move declaration of reslen to
	outside the ifdefs. Thanks to Hermann Peifer for the report.

	* gawkapi.c (awk_value_to_node): Initialize ext_ret_val to NULL
	to avoid compiler warnings.

2017-04-12         Manuel Collado        <m-collado@users.sourceforge.net>

	Fix the FPAT bug reported by Ed Morton in the gawk-bug mailing list.

	* awk.h (Regexp): Remove the non_empty flag.
	* field.c (fpat_parse_field): Restructure the code to reduce complexity
	and document the new structure.

	* field.c (fpat_parse_field): Further restructuring to avoid
	invalid reads as reported by valgrind.

2017-04-10         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (enum opcodeval): For the avoidance of doubt, specify that
	Op_illegal must equal zero.
	* symbol.c (bcfree): Improve clarity by setting opcode to Op_illegal
	instead of 0.
	(free_bc_mempool): Improve clarity by comparing opcode to Op_illegal
	instead of to 0.

	* field.c (set_FIELDWIDTHS): Set use_chars to awk_true, since its
	type is awk_bool_t.

2017-04-10         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (free_bc_mempool): Change `first' from int to bool.

2017-04-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (fw_parse_field): Edit comment about resetting shift state.
	* gawkapi.h (awk_fieldwidth_info_t): Make white space more uniform.

2017-04-08  Eli Zaretskii  <eliz@gnu.org>

	* main.c (usage, copyleft) [__MINGW32__]:
	* io.c (non_fatal_flush_std_file, close_io) [__MINGW32__]: Call
	w32_maybe_set_errno to correctly set errno to EPIPE when appropriate.

	* awk.h (die_via_sigpipe) [__MINGW32__]: MinGW-specific definition.

2017-04-07         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (INSTRUCTION_POOL): Redefine as an array of structures so we
	can track allocated blocks.
	* symbol.c (pools): Make it a pointer to avoid copying.
	(struct instruction_block): Define structure to hold a block of
	allocated instructions.
	(bcfree): Update to use new INSTRUCTION_POOL definition.
	(bcalloc): Allocate an instruction by searching first on the free
	list, second for free space in the current block, or third by
	allocating a new block.
	(set_context): Update to reflect that pools is now a pointer.
	(free_bc_mempool): New helper function to free a pool of a certain size.
	(fre_bcpool): Call free_bc_mempool for each pool.

2017-04-04         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (INSTRUCTION): Add pool_size member.
	[MAX_INSTRUCTION_ALLOC]: New macro.
	(INSTRUCTION_POOL): New type.
	(struct context): Use INSTRUCTION_POOL.
	* array.c (assoc_list): Reorg the code a bit to make sure
	to always free the INSTRUCTIONs allocated for calling a
	user-supplied sorting function. Based on code by
	Andrew Schorr.
	* symbol.c (free_bcpool): Rework to use an INSTRUCTION_POOL.
	(bcfree, bcalloc): Rework to use separate chains in
	the instruction pool.
	(set_context): Update appropriately.

2017-03-27         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (parse_field_func_t): New typedef. Used as needed.
	(fw_parse_field): Edit comment about resetting shift state.
	(set_parser): Fix leading comment's style and type of argument.
	(set_FIELDWIDTHS): Improve the fatal error message.
	* gawkapi.h: Minor edits in some comments.

2017-03-27         Arnold D. Robbins     <arnold@skeeve.com>

	Cause EPIPE errors to stdout to generate a real SIGPIPE.

	* awk.h (die_via_sigpipe): New macro.
	* builtin.c (efwrite): Use it.
	* io.c (non_fatal_flush_std_file): Ditto.
	* main.c (usage): Ditto.

2017-03-25         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (flush_io): Use r_fatal and r_warning for messagefunc
	in the loop.

2017-03-24         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (efwrite): Exit successfully upon EPIPE, as SIGPIPE
	done. Improve error messages upon failure to write.
	(do_fflush): Update ERRNO for non-fatal flush failures.
	* io.c (non_fatal_flush_std_file): Update ERRNO when flush is
	non-fatal.
	(flush_io): If a redirect is marked non-fatal, only warning,
	not fatal message.

2017-03-23         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Updated again.

2017-03-22         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* NEWS: Document new PROCINFO["FS"] value of "API".

2017-03-22         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* NEWS: Document new FIELDWIDTHS skip capability and API input parser
	field parsing enhancement.

2017-03-22         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_input_buf_t): Update get_record comment regarding the
	new field_width argument.

2017-03-21         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_fieldwidth_info_t): Define new structure to contain
	API field parsing info, replacing the previous awk_input_field_info_t
	array.
	(awk_fieldwidth_info_size): Define macro to calculate size of the
	variable-length awk_fieldwidth_info_t structure.
	(awk_input_buf_t): Update get_record prototype to update the type
	of the final field_width argument from 'const awk_input_field_info_t **'
	to 'const awk_fieldwidth_info_t **'.
	* awk.h (set_record): Change 3rd argument from
	'const awk_input_field_info_t *' to 'const awk_fieldwidth_info_t *'.
	* io.c (inrec, do_getline_redir, do_getline): Change field_width type
	from 'const awk_input_field_info_t *' to
	'const awk_fieldwidth_info_t *'.
	(get_a_record): Change field_width argument type from
	'const awk_input_field_info_t **' to 'const awk_fieldwidth_info_t **'.
	* field.c (api_parser_override): Define new boolean to track whether
	API parsing is currently overriding default parsing behavior.
	(api_fw): Change type from 'const awk_input_field_info_t *'
	to 'const awk_fieldwidth_info_t *'.
	(FIELDWIDTHS): Change type from 'int *' to 'awk_fieldwidth_info_t *'.
	(set_record): Use new boolean api_parser_override to track whether
	API parsing override is in effect, since we can no longer discern
	this from the value of parse_field -- FIELDWIDTHS parsing uses the
	same function.
	(calc_mbslen): New function to calculate the length of a multi-byte 
	string.
	(fw_parse_field): Enhance to support the awk_fieldwidth_info_t 
	structure instead of simply using an array of integer field widths.
	(api_parse_field): Remove function no longer needed since fw_parse_field
	now supports both FIELDWIDTHS and API parsing.
	(set_parser): Use api_parser_override instead of comparing parse_field
	to api_parse_field.
	(set_FIELDWIDTHS): Enhance to use new awk_fieldwidth_info_t structure
	and parse new skip prefix for each field.
	(current_field_sep): Use api_parser_override flag instead of comparing
	to api_parse_field.
	(current_field_sep_str): Ditto.

2017-03-20         Arnold D. Robbins     <arnold@skeeve.com>

	Improve handling of EPIPE. Problems reported by
	Alexandre Ferrieux <alexandre.ferrieux@orange.com>
	and David Kerns <david.t.kerns@gmail.com>.

	* awk.h (ignore_sigpipe, set_sigpipe_to_default,
	non_fatal_flush_std): Declare new functions.
	(ignore_sigpipe, set_sigpipe_to_default,
	non_fatal_flush_std): New macros.
	* builtin.c (do_fflush): When nonfatal not in force, flush
	of stdout/stderr and EPIPE exits, simulating SIGPIPE, as
	in nawk/mawk. Flush of other redirections with EPIPE now
	also fatals.
	(do_system): Use ignore_sipipe and set_sigpipe_to_default
	instead of uglier inline ifdefed code.
	* main.c (main): Ditto.
	* io.c (redirect_string, two_way_open, gawk_popen): Ditto.
	(flush_io): Use non_fatal_flush_std for stdout and stderr.

	Unrelated:

	* config.guess, config.rpath, config.sub, install-sh:
	Sync with GNULIB.

2017-03-16         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Some cleanups.

2017-03-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_input_field_info_t): Define new structure to contain
	API field parsing info.
	(awk_input_buf_t): Update get_record prototype to use an array of
	awk_input_field_info_t instead of integers.
	* awk.h (set_record): Change 3rd argument from 'const int *' to
	'const awk_input_field_info_t *'.
	* field.c (api_fw): Now points to an array of awk_input_field_info_t
	instead of integers.
	(set_record): Change 3rd argument to point to an array of
	awk_input_field_info_t.
	(api_parse_field): Update parsing logic to use awk_input_field_info_t
	structures instead of an array of integers.
	* io.c (inrec, do_getline_redir, do_getline): Change field_width type
	from 'const int *' to 'const awk_input_field_info_t *'.
	(get_a_record): Change field_width argument type from 'const int **'
	to 'const awk_input_field_info_t **'.

2017-03-09         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c: Minor style edits.

2017-03-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (normal_parse_field): Renamed from save_parse_field to reflect
	better its purpose. Added a comment to explain more clearly what's
	going on.
	(set_record, set_parser): Rename save_parse_field to normal_parse_field.

2017-03-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_input_buf_t): Remove field_width array and instead
	add it as a 6th argument to the get_record function. This should
	not break existing code, since it's fine to ignore the additional
	argument. Document the behavior of the field_width argument.
	* io.c (inrec): Pass pointer to field_width array to get_a_record,
	and then hand it off to set_record.
	(do_getline_redir): If not reading into a variable, pass pointer to
	field_width array to get_a_record and then hand it off to set_record.
	(do_getline): Ditto.
	(get_a_record): Add a 4th field_width argument to pass through to
	the API get_record method.

2017-03-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (set_record): Add a new argument containing a field-width
	array returned by an API parser.
	(field_sep_type): Add new enum value Using_API.
	(current_field_sep_str): Declare new function.
	* field.c (save_parse_field): New static variable to save the
	parse_field value in cases where it's overridden by API parsing.
	(api_fw): New static variable to hold pointer to API parser fieldwidth
	array.
	(set_record): Add new field-width array argument. If present, API
	parsing will override the default parsing mechanism.
	(api_parse_field): New field parser using field widths supplied by the
	API. This is very similar to the existing fw_parse_field function.
	(get_field): Fix typo in comment.
	(set_parser): New function to set default parser and check whether
	there's an API parser override in effect. Update PROCINFO["FS"] if
	something has changed.
	(set_FIELDWIDTHS): Use set_parser and stop updating PROCINFO["FS"].
	(set_FS): Ditto.
	(set_FPAT): Ditto.
	(current_field_sep): Return Using_API when using the API field parsing
	widths.
	(current_field_sep_str): New function to return the proper string
	value for PROCINFO["FS"].
	* gawkapi.h (awk_input_buf_t): Add field_width array to enable the
	parser get_record function to supply field widths to override the
	default gawk field parsing mechanism.
	* io.c (inrec): Pass iop->public.field_width to set_record as the
	3rd argument to enable API field parsing overrides.
	(do_getline_redir, do_getline): Ditto.
	* main.c (load_procinfo): Use new current_field_sep_str function
	instead of switching on the return value from current_field_sep.

2017-02-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (boolval): Return bool instead of int.
	* eval.c (eval_condition): Same.
	* io.c (pty_vs_pipe): Same
	Thanks to Andrew Schorr for pointing these out.

2017-02-21         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* NEWS: Document that mktime now takes an optional utc-flag argument.
	* awkgram.y (tokentab): Modify mktime entry to indicate that it may
	accept two arguments.
	* builtin.c (mktime_tz): New function to run mktime in an arbitrary
	time zone. Code was copied from the Linux timegm man page.
	(do_mktime): Add support for new optional 2nd argument utc-flag by
	using the new mktime_tz function.
	(do_strftime): Change do_gmt type from int to bool.

2017-02-17         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_typeof): Handle arguments that have
	the NULL_FIELD flag set.

2017-02-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (set_profile_text): Improve code clarity by using emalloc
	to allocate the string instead of abusing estrdup.

2017-02-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (set_profile_next): Allocate an extra byte at the
	end for the NUL in case we add a sign. Thanks to Andrew Schorr
	for making me look at this code.

	And later in the same day:

	* awkgram.y (set_profile_next): Undo previous change, since estrdup
	handles it, but updated the comments.

2017-02-01         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (mbc_char_count): Remove spurious multiplies by
	gawk_mb_cur_max. Thanks to Andrew Schorr for making me look
	at this code.

	Unrelated:

	* awkgram.y (make_profile_number): Renamed to ...
	(set_profile_next): New function. All calls adjusted. Also improved
	use at MPFR number case.

2017-01-28         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (inetfile): Replace strncmp with memcmp in a few places, now
	that we are checking string length beforehand.

2017-01-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (redirect_string): Check explen positive before accessing *str.
	In lintwarn message, use explen string length. Pass length to inetfile.
	(devopen): Pass name length to inetfile.
	Stop assuming that remoteport is NUL-terminated.
	(two_way_open): Pass name length to inetfile.
	(inetfile): Stop assuming NUL string termination; add checks to avoid 
	string overrun.

2017-01-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (str_terminate_f): New helper function for terminating a string
	NODE.
	(str_terminate): Macro wrapper to call str_terminate_f.
	(str_restore): New macro to restore the string.
	* builtin.c (do_strftime): Use str_terminate and str_restore.
	(do_dcgettext): Ditto, and remove saved_end flag since equivalent
	to testing (t2 != NULL). Fix overrun bug in calculating result
	length when !ENABLE_NLS.
	(do_dcngettext, do_bindtextdomain): Use str_terminate and str_restore.
	* interpret.h (Op_arrayfor_init, Op_indirect_func_call): Ditto.
	* str_array.c (env_remove): Ditto.

2017-01-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h [UNFIELD]: Fix condition for assignment from
	value with valref == 1. Fixes problems introduced at gawk 4.1.2.

2017-01-27         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h: Update copyright year.
	* debug.c (do_run): Rework error message to ease translation.
	Thanks to Rafael Fontenelle <rafaelff@gnome.org> and to
	Eli Zaretskii <eliz@gnu.org>.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_dcgettext): First argument also needs protection
	from string overrun.
	(do_dcngettext): Need to terminate string1 and string2 also,
	and replace strlen(the_result), which could overrun.
	(do_bindtextdomain): Terminate both string args, and eliminate
	saved_end boolean which is redundant with (t2 != NULL).

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (Op_arrayfor_init): Protect against string overrun
	on sorting method.
	(Op_indirect_func_call): Terminate function name.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* str_array.c (env_remove): Terminate string before calling unsetenv.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (is_hex): Add a new argument pointing to the end of the string
	so we can check for string overrun.
	(r_force_number): Pass string end to is_hex.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (get_numbase): Add string length argument so we can operate
	on unterminated strings.
	* awkgram.y: Call get_numbase with string length, and fix off-by-one
	error in length passed to nondec2awknum: should be strlen(tokstart)-1
	based on surrounding code.
	* builtin.c (do_strtonum): Pass string length to get_numbase.
	(nondec2awknum): Check string length before accessing characters.
	* mpfr.c (force_mpnum): Pass string length to get_numbase.
	* node.c (r_force_number): Pass string length to get_numbase.
	(get_numbase): Add string length argument and honor it.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_strftime): If format argument is passed, we need
	to terminate it in case it's a field variable.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_format_val): Before we free s->stptr, make sure that it
	was malloced.
	(wstr2str): Add comment explaining why it's safe to free n->stptr
	without doing any checks.
	* mpfr.c (mpg_format_val): Ditto. And no need to reset the STRCUR flag
	that we just checked.

2017-01-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (enum block_id): Remove BLOCK_INVALID, since it serves no
	useful purpose and seems to slow things down a bit.
	* node.c (nextfree): Remove first invalid entry.

2017-01-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (BLOCK): Remove typedef. BLOCK was used for 2 different
	purposes: to contain a block allocation list header, and to hold
	each individual allocated item. This was confusing, because the "size"
	field was set only in the header, but not in each element.
	(struct block_header): The block header contains a pointer to the first
	element and the element size.
	(struct block_item): Represent a single allocated item. This contains
	only a pointer to the next element. This reduces the minimum allocated
	item size from 2 pointers to 1 (16 bytes to 8 bytes on x86_64).
	(nextfree): Change array item type from BLOCK to struct block_header.
	(getblock, freeblock): Change cast from 'BLOCK' to 'struct block_item'.
	* node.c (nextfree): Now an array of 'struct block_header' instead of
	BLOCK. Switch the ordering to put the next pointer before the size.
	(more_blocks): Replace 'BLOCK' with 'struct block_item', and add
	an assert to ensure that the allocation size is at least as large
	as 'struct block_item', i.e. 1 pointer.

2017-01-22         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (numtype_choose): New backend macro used to implement
	various macros whose calculations depend on how a number is
	actually represented. This improves readability and should give
	a small performance improvement when not using extended precision.
	(get_number_ui, get_number_si, get_number_d, get_number_uj, iszero):
	Rewrite using new numtype_choose macro.

2017-01-04         Arnold Robbins        <arnold@skeeve.com>

	Trade space for time for programs that toggle IGNORECASE a lot.
	Brings 25% to 39% speedup.  NODE does not actually grow in size.

	* awk.h (NODE::preg): Now an array of size two.
	[CASE]: Flag no longer needed, so removed.
	(IGNORECASE): Change type from int to bool.
	* awkgram.y (make_regnode): Build two copies of the compiled regexp,
	one without ignorecase, and one with.
	* io.c (RS_re): Array replacing RS_re_yes_case and RS_re_no_case.
	(set_RS): Use RS_re[IGNORECASE] as appropriate. Free and recompute
	as needed.
	* main.c (IGNORECASE): Change type from int to bool.
	* re.c (re_update): Simplify the code. No need to check CASE flag
	any longer. Recompute only if text of regexp changed.
	* symbol.c (free_bc_internal): Adjust to free both elements of
	m_re_reg.

2017-01-18         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (r_interpret): Increase robustness of the optimization
	logic in Op_assign_concat -- check that the node has MALLOC set,
	and make sure to wipe all flags other than MALLOC, STRING, STRCUR,
	and possibly WSTRCUR. Use STFMT_UNUSED define.

2017-01-15         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (r_interpret): Fix bug in Op_assign_concat reported
	on Cygwin mailing list. The string concatenation optimization was
	not updating the node correctly by setting STRING and STRCUR flags
	and setting stfmt.

2017-01-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Enhance API to support extended-precision arithmetic.
	* awk.h (enum block_id): Add new values BLOCK_MPFR and BLOCK_MPZ.
	(make_number_node): New inline function to reduce code duplication
	for creating numeric nodes.
	* gawkapi.h (gawk_api_major_version): Bump to 3.
	(awk_number_t): New typedef to represent numbers with varying internal
	representations.
	(awk_value_t): For numbers, replace double with awk_number_t.
	(num_value): Redefine.
	(num_type, num_ptr): New defines for awk_number_t union members.
	(gawk_api_t): Add constants for version checking: gmp_major_version,
	gmp_minor_version, mpfr_major_version, and mpfr_minor_version.
	Add functions api_get_mpfr and api_get_mpz to allocate memory for
	extended-precision numbers to hand to gawk.
	(get_mpfr_ptr, get_mpz_ptr): Helper macros to wrap api_get_mpfr and
	api_get_mpz.
	(make_number): Modify to populate awk_number_t correctly.
	(make_number_mpz, make_number_mpfr): New helper functions to create
	extended-precision numeric nodes.
	(check_mpfr_version): New macro to check GMP/MPFR version compatibility
	in extensions that want to support extended-precision math.
	* gawkapi.c (getmpfr, freempfr, getmpz, freempz): New macros to
	allocate and free memory blocks for extended-precision math.
	(awk_value_to_node): For AWK_NUMBER values, support three different
	kinds of internal numbers: double, mpz_t, and mpfr_t.
	(assign_number): New helper function to convert a numeric node to
	an awk_value_t.
	(node_to_awk_value): Use assign_number to pass numbers properly.
	(api_get_mpfr): Implement new api_get_mpfr hook.
	(api_get_mpfz): Implement new api_get_mpz hook.
	(api_impl): Add GMP & MPFR versions, api_get_mpfr, and api_get_mpz.
	* node.c (r_make_number): Use new make_number_node inline function
	to reduce code duplication.
	(nextfree): Add block allocators for mpfr_t and mpz_t.
	(more_blocks): Add an assert to protect against cases where the block
	size is too small to hold our structure.
	* mpfr.c (mpg_node): Use new make_number_node inline function
	to reduce code duplication.

2017-01-04         Arnold Robbins        <arnold@skeeve.com>

	* config.guess, config.sub, compile, depcomp: Sync from latest
	in GNULIB.

2016-12-27         Juergen Kahrs         <Juergen.Kahrs@googlemail.com>

	* CMakeLists.txt: Updated after adding support library.

2016-12-23         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (GNUPG_CHECK_MPFR): Don't call on PowerPC
	Macintosh.  C99 and the last version of MPFR that works on
	that platform don't get along. Sigh.

2016-12-22         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNULIB.
	* intprops.h: New file.
	* Makefile.am (base_sources): Add intprops.h.

	Unrelated.  Import GNULIB fix for regex: fix integer-overflow
	bug in never-used code.
	Problem reported by Clément Pit–Claudel in:
	http://lists.gnu.org/archive/html/emacs-devel/2016-12/msg00654.html
	Fix by Paul Eggert  <eggert@cs.ucla.edu>:

	* regex_internal.h: Include intprops.h.
	* regexec.c (re_search_2_stub): Use it to avoid undefined
	behavior on integer overflow.

	Unrelated. Set up a support directory for externally obtained
	support files.

	* Makefile.am (base_sources, EXTRA_DIST): Edit lists.
	(SUBDIRS): Get ordering right.
	(LDADD): Add support/libsupport.a.
	(DEFS): Add -I for support directory.
	* dfa.c, dfa.h, getopt.c, getopt.h, getopt1.c, getopt_int.h,
	intprops.h, localeinfo.c, localeinfo.h, random.c, random.h,
	regcomp.c, regex.c, regex.h, regex_internal.c, regex_internal.h,
	regexec.c, verify.h, xalloc.h: Moved to support.

	Unrelated: Totally break binary compatibility in the API
	after merging in API min/max changes and REGEX and STRNUM
	support in the API:

	* gawkapi.c (valtype2str): New function.
	(node_to_awk_value): Minor simplification in a switch.
	(api_flatten_array): Removed.
	(api_flatten_array_typed): Use valtype2str in error message.
	(api_impl): Reorder functions to group related ones together again.
	* gawkapi.h (awk_valtype_t): Reorder enum values.
	(struct gawk_api): Remove api_flatten_array field.  Reorder
	functions to group related ones together again.

2016-12-17         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (api_add_ext_func): Add comment about point to
	awk_ext_func_t not being const but gawk doesn't use it.
	* * interpret.h (Op_ext_builtin): Simplify code, check only
	if do_lint and ! f->suppress_lint and num_args > max_expected.

2016-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (awk_ext_func_t): Put max back before min. Restores
	source compatibility, although there will be compile warnings
	because of the 3rd argument for the C function being missing.
	* interpret.h (Op_ext_builtin): Used size_t instead of int for
	the various variables. Add a check that max expected > 0.

2016-12-14         Arnold D. Robbins     <arnold@skeeve.com>

	MAJOR BREAKING API CHANGE.

	* awk.h (INSTRUCTION): Update extension function pointer to
	take 3rd argument of pointer to struct awk_ext_func.
	* gawkapi.c (api_add_ext_func): Update third arg to not be const.
	* gawkapi.h (awk_ext_func_t): Put min before max. Add suppress_lint
	and data pointer.
	[gawk_api_major_version]: Update to 2.
	[gawk_api_minor_version]: Reset to 0.
	(api_add_ext_func): Update third arg to not be const.
	* interpret.h (Op_ext_symbol): Revise lint check.

2016-12-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (INSTRUCTION): Replace min_required and max_expected
	with a pointer to the extension functions awk_ext_func_t struct.
	* ext.c (make_builtin): Store a pointer to the extension function
	struct into the INSTRUCTION instead of the min and max.
	* gawkapi.h (awk_ext_func): Use size_t instead of unsigned short.
	Put min second, which preserves source code compatibility.
	* interpret.h (Op_ext_builtin): Use the pointer for the info
	directly. If lint and max_expected > 0 and args > max_expected
	print a message and set max_expected to zero so we only print once
	per function. Remove special case of both min and max being zero.
	(Op_ext_func): Adjust creation of the data structures.

2016-12-11         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNULIB.

2016-12-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Add API support for strnum values.
	* gawkapi.c (awk_value_to_node): Add AWK_STRNUM.
	(assign_string): Add a type argument so we can use this for AWK_STRING
	or AWK_STRNUM.
	(node_to_awk_value): When AWK_NUMBER is requested, a regex value
	should return false, as per the header file documentation.
	Add support for AWK_STRNUM requests. When AWK_REGEX is requested,
	implement the cases properly instead of always returning true.
	Fix AWK_SCALAR logic. For AWK_UNDEFINED, rewrite using a switch
	and support AWK_STRNUM.
	(api_sym_update): Add AWK_STRNUM.
	(api_sym_update_scalar): Add optimized support for updating AWK_STRNUM.
	(valid_subscript_type): Add AWK_STRNUM.
	(api_create_value): Add AWK_STRNUM.
	* gawkapi.h (awk_valtype_t): Add AWK_STRNUM.
	(strnum_value): New macro.
	(Value fetching table): Updated.

2016-12-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (assign_regex): Do not call assign_string, since we
	know that a REGEX value is not an unterminated field string.
	* gawkapi.h (make_regex): Delete macro.
	(make_const_regex, make_malloced_regex): Add new macros to replace
	make_regex with necessary memory management support.

2016-12-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (fixtype): Remove conditional checking if the node type
	is Node_val. This is already covered by the assert, and if it's not
	true, we have serious bugs.
	* builtin.c (do_typeof): Do not treat Node_var the same way as
	Node_val, since they are different beasts. In reality, the argument
	to this function will never have type Node_var.

2016-12-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_element_t): Remove obsolete comment claiming that
	the index will always be a string.
	(gawk_api_t): Add new api_flatten_array_typed function and indicate
	that api_flatten_array has been superseded.
	(flatten_array_typed): New macro to call api_flatten_array_typed.
	(flatten_array): Redefine using the new flatten_array_typed macro.
	* gawkapi.c (api_flatten_array_typed): New function renamed from
	api_flatten_array to flatten an array with the types requested by the
	caller. Also update the comments and error messages.
	(api_flatten_array): Now a wrapper around api_flatten_array_typed.
	(api_impl): Add new api_flatten_array_typed hook.

2016-12-06         Arnold D. Robbins     <arnold@skeeve.com>

	Add minimum required and maximum expected number of arguments
	to the API.

	* awk.h (INSTRUCTION): Add new members min_required and max_expected.
	* ext.c (make_builtin): Store values from extension function struct
	into the INSTRUCTION.
	* gawkapi.h (awk_ext_func): Add min_required args. Make both it and
	max_expected_args into unsigned short to match type in INSTRUCTION.
	* interpret.h (Op_ext_builtin): Store min_required and max_expected
	in instructions. Add checking code and lint checks.
	(Op_ext_func): Copy min_required and max_expected from function info.


2016-12-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (r_make_string_type): New inline function to create strings
	of any type, currently AWK_STRING or AWK_REGEX.
	(r_make_string): Now a wrapper around r_make_string_type.
	(make_regex): Convert from an inline function to a macro that
	calls r_make_string_type.

2016-11-30         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with fixes in GNULIB.

	Unrelated:

	* gawkapi.h (make_regex): New function.

2016-11-29         Arnold D. Robbins     <arnold@skeeve.com>

	Add support for typed regex variables to the API.

	* awk.h (make_typed_regex): Declare function.
	* awkgram.y (typed_regexp): Call make_typed_regex instead of
	using inline code.
	* gawkapi.h (AWK_REGEX): New value type.
	(regex_value): New macro.
	(Value fetching table): Updated.
	* gawkapi.c (awk_value_to_node, node_to_awk_value, api_sym_update,
	api_sym_update_scalar, valid_subscript_type, api_create_value):
	Add support for AWK_REGEX.
	(assign_regex): New function.
	(api_flatten_array): Adjust comment.
	* node.c (make_typed_regex): New function; moved code from grammar.

2016-11-29         Arnold D. Robbins     <arnold@skeeve.com>

	Remove redundant flag from dfa:

	* dfa.c (dfasyntax): Use RE_ICASE instead of DFA_CASE_FOLD.
	* dfa.h (DFA_CASE_FOLD): Removed.
	* re.c (make_regexp): Use RE_ICASE for regex and dfa. Yay!

	Unrelated: Don't have to recompute syntax stuff every time
	we compile a regexp.

	* dfa.c (dfacopysyntax): New function.
	(dfaalloc): Zero out the newly allocated memory.
	* dfa.h (dfacopysyntax): Declare it.
	* re.c (make_regexp): Declare two static dfaregs, one for
	with and without ignorecase. Compute the syntax once for each,
	then use dfacopysyntax to copy the settings when compiling
	a regexp.

2016-11-28         Arnold D. Robbins     <arnold@skeeve.com>

	Make gawk compile on HP-UX 11.33.

	* debug.c (serialize_list): Renamed from `serialize'.
	(unserialize_list): Renamed from `unserialize', for consistency.

	Unrelated:

	* dfa.c: Sync with GNULIB. Twice in one day.

	Unrelated: Start improving profiling comments for switch/case.

	* awkgram.y (switch_head): New production.

2016-11-21         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNULIB.

2016-11-17         Arnold D. Robbins     <arnold@skeeve.com>

	General cleanup for zero termination of strings.

	* array.c (do_delete): Use %.*s.
	(value_info): Get length and use %.*s.
	(asort_actual): Save and restore character after end.
	* awkgram.y (split_comment): Use make_string, not make_str_node.
	* builtin.c (do_fflush): Use %.*s.
	(locale_category_from_argument, do_dcgettext, do_dcngettext,
	do_bindtextdomain): Save and restore character after end.
	* debug.c (do_info, print_array, print_subscript, do_print_var,
	do_set_var, display, do_watch, print_watch_item, serialize_subscript,
	do_print_f): Use %.*s.
	* eval.c (cmp_nodes, fmt_index): Save and restore character after end.
	* interpret.h (r_interpret): Fix computation for concatenation of
	wide strings.
	* io.c (is_non_fatal_redirect): Add length parameter; save and
	restore character after last. Adjust all other declarations and calls.
	(do_close): Save and restore character after end.
	* mpfr.c (ieee_fmts): Adjust table indentation.
	(do_mpfr_strtonum): Clear wide string members of the union.
	* msg.c (err): Use %.*s.

2016-11-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h [USER_INPUT]: Renamed from MAYBE_NUM.
	* builtin.c, eval.c, field.c, int_array.c, io.c, main.c,
	mpfr.c, node.c: Change all uses.

2016-11-15         Arnold D. Robbins     <arnold@skeeve.com>

	Finish reworking typed regexes.

	* awk.h (typed_re): Replaces tre_reg.
	* awkgram.y (typed_regexp production): Node_val points to a regular
	Node_regex and also has string value and length.
	(make_regnode): Simplified back to its original form.
	* builtin.c (call_sub, call_match, call_split_func): For REGEX,
	get n->typed_re.
	* field.c (do_split, do_patsplit): Ditto, for separator regexp.
	* profile.c (pprint): Op_match_rec, handle REGEX correctly.
	* re.c (re_update): If REGEX, get t->typed_re->re_reg.

2016-11-15         Arnold D. Robbins     <arnold@skeeve.com>

	Start reworking typed regexes.

	* awk.h (Node_typedregex): Nuked.
	[REGEX]: New flag.
	(tre_reg): New member in val part of NODE union.
	(force_string, force_number, fixtype): Remove use of Node_typedregex.
	* awkgram.y (grammar): Use REGEX flag instead of node type.
	(valinfo); Ditto.
	(make_regnode): Adjust creation based on node type.
	* builtin.c (do_length, do_print, call_sub, call_match,
	call_split_func, do_typeof): Adjust code.
	* debug.c (watchpoint_triggered, initialize_watch_item,
	print_memory): Adjust code.
	* eval.c (nodetypes): Remove Node_typedregex.
	(flags2str): Add REGEX.
	(setup_frame): Adjust code after removal of Node_typedregex.
	* interpret.h (r_interpret): Adjust code after removal
	of Node_typedregex.
	* profile.c (pp_typed_regex): Renamed from pp_strong_regex.
	(pp_string_or_strong_regex): Renamed from pp_string_or_strong_regex.
	(pprint): Adjust code after removal of Node_typedregex.
	* re.c (re_update): Adjust code after removal of Node_typedregex.

2016-11-04  Eli Zaretskii  <eliz@gnu.org>

	* builtin.c (efwrite) [__MINGW32__]: Call w32_maybe_set_errno if
	errno is not set or set to EINVAL.

	* nonposix.h (w32_maybe_set_errno) [__MINGW32__]: Add prototype.

2016-11-01         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (flags2str): Add NO_EXT_SET and NUMCONSTSTR.

2016-10-31         Arnold D. Robbins     <arnold@skeeve.com>

	Fix valgrind issues.

	* io.c (init_awkpath): Need to allocate max_path+3 pointers.
	* awkgram.y (make_profile_number): Need to add STRCUR flag and
	set n->stfmt to STFMT_UNUSED. See the comment in the code.

2016-10-26         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (init_awkpath): Set max path len for leading separator.

2016-10-25         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (init_awkpath): Restore documented behavior whereby
	null elements represent the current directory. Sheesh.
	Bug reported by "Jun T." <takimoto-j@kba.biglobe.ne.jp>.

	Disallow negative arguments to the bitwise functions.

	* NEWS: Document this.
	* builtin.c (do_lshift, do_rshift, do_and, do_or, do_xor, do_compl):
	Make negative arguments a fatal error.
	* mpfr.c (do_mpfr_compl, get_intval): Ditto.

2016-10-23         Arnold D. Robbins     <arnold@skeeve.com>

	* General: Remove trailing whitespace from all relevant files.
	* mpfr.c: Replace Unicode sequences with ASCII.
	* cint_array.c: Ditto.

2016-10-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Typo fix in call to add_sign_to_num.

2016-10-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (enum opcodeval): Add Op_unary_plus.
	* awkgram.y (add_sign_to_num): New routine to put in a sign on
	profiling constants.  Call it as necessary.
	In unary plus production, use new opcode, or set up a
	constant as for unary minus.
	(negate_num): Call add_sign_to_num instead of doing it directly.
	* eval.c (optypetab): Add entry for Op_unary_plus.
	* interpret.h (r_interpret): Add case for Op_unary_plus.
	* profile.c (pprint, prec_level, is_scalar): Ditto.

2016-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNULIB.

2016-10-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (make_profile_number): Allocate an extra byte for the
	string, so there's room for a minus if necessary. Store '\0'
	in the right place.
	(negate_num): Use memmove to shift the string up and then
	insert a minus, instead of doing a fresh alloc + copy + free.

2016-10-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (NUMCONSTSTR): New flag value.
	* awkgram.y (make_profile_number): New function. Use it
	wherever we make a number.  This calls make_number and then, if
	pretty printing, save the original string value and sets NUMCONSTSTR.
	(negate_num): If NUNCONSTSTR set, update the saved string value.
	* profile.c (pp_number): Assert NUMCONSSTR set, use that value.
	Remove previous code.

2016-09-24  Eli Zaretskii  <eliz@gnu.org>

	* debug.c (restart) [__MINGW32__]: Cast 2nd argument of execvp to
	avoid compiler warnings about prototype mismatch.  Reported by
	Marc de Bourget <marcdebourget@gmail.com>.

2016-09-09         Norihiro Tanaka      <noritnk@kcn.ne.jp>

	* awk.h (struct Regexp): Remove member has_anchor.  All uses removed.
	* re.c (make_regexp, research): Use dfa matcher for regex with anchor.

2016-09-09         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep.

2016-09-08  Paul Eggert  <eggert@cs.ucla.edu>

	* dfa.c, dfa.h: Sync with grep.
	* re.c (make_regexp): Adjust to DFA API changes.

2016-09-08         Arnold D. Robbins     <arnold@skeeve.com>

	* command.y: Update license text to version 3. Oops.

2016-09-07         Arnold D. Robbins     <arnold@skeeve.com>

	* cmd.h, debug.c: Update license text to version citing
	GPLv3+ and with correct FSF address. Thanks to
	David Kaspar <dkaspar@redhat.com> for pointing out the need.

2016-09-02         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep.

2016-09-01         Arnold D. Robbins     <arnold@skeeve.com>

	Merge grep's now thread-safe dfa. Wheee.

	* dfa.h, dfa.c: Sync with grep.
	* localeinfo.h, localeinfo.c, verify.h: New files.
	* Makefile.am (base_sources): Adjust.
	* awk.h (using_utf8): Declare new function.
	* node.c (str2wstr): Use using_utf8 instead of now-gone dfa function.
	* re.c: Include "localeinfo.h".
	(localeinfo): New static variable.
	(make_regexp): Adjust call to dfa_syntax.
	(resetup): Call init_localeinfo on localeinfo. Remove call to
	now-gone function dfa_init.
	(using_utf8): New function.

2016-08-29         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (fwrite_unlocked): Check for it.
	* awk.h (fwrite): Define to fwrite_unlocked if we have it.
	* NEWS: Make note of speed improvement.

2016-08-25         Arnold D. Robbins     <arnold@skeeve.com>

	POSIX now says use strcmp for == and !=. Thanks to Chet Ramey
	for pointing me at the change.  Make it so:

	* awk.h (cmp_nodes): New 3rd param indicating strcmp, not strcoll.
	* debug.c (cmp_val): Update call to cmp_nodes.
	* eval.c (cmp_nodes): New 3rd param indicating strcmp, not strcoll.
	Adjust code and all callers.
	(scalar_cmp_t): New enum type. Used in ...
	(cmp_scalars): ... in order to call cmp_nodes correctly.
	* interpret.h: Use the enum type in calls to cmp_scalars.
	* re.c (re_update): Adjust call to cmp_nodes.

2016-08-25         Norihiro Tanaka      <noritnk@kcn.ne.jp>

	* awk.h (struct Regexp): Remove dfa.  Now dfareg instead of it.  All
	referers changed.
	* re.c (research): Arrange caller of dfaexec and research.
	* (avoid_dfa): Removed.  All callers changed.
	* awk.h (avoid_dfa): Removed.

	Other changes by Arnold Robbins:

	* awk.h (struct Regexp): Change various boolean members to bool.
	(RE_NO_FLAGS): New #define.
	* interpret.h: Use RE_NO_FLAGS instead of zero.
	* re.c (research): Prettify the logic a little bit.

2016-08-25         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep.

2016-08-25         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.1.4: Release tar ball made.

2016-08-23         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h: Sync with grep. API changes.
	* dfa.c: Sync with grep.
	* re.c (make_regexp): Adjust for API changes, move call to dfasyntax
	into stanza that compiles the regex.
	(resetup): Call dfa_init.
	* node.c (str2wstr): using_utf8 is now called dfa_using_utf8.

	Unrelated:

	* Makefile.am: Quote all uses of $(srcdir) and $(distdir).
	(spell): New target.

2016-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep.

2016-08-15         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* int_array.c (is_integer): Fix merge of stable changes to remove
	obsolete string formatting check that has been superseded by
	the new standard_integer_string check.

2016-08-14         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): Only call dfasyntax if actually using
	dfa. Gives a 14% speedup on this test: https://raw.githubusercontent.com/chadbrewbaker/awka/master/benchmark/regexp.awk.
	From blathering in comp.lang.awk.

2016-08-12         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

	Unrelated:

	* int_array.c: Minor text and formatting edits.

2016-08-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Add a comment explaining the NUMINT flag in more detail.
	* int_array.c (standard_integer_string): New function to test whether
	a string matches what would be produced by sprintf("%ld", <value>).
	(is_integer): Fix bug -- if NUMBER was set, then the function was
	accepting strnum values with nonstandard string representations. We
	now call standard_integer_string to check that the string looks OK.
	Also added ifdef'ed code to simplify the function by relying upon
	force_number to parse the string, but this is disabled due to possible
	negative performance impact.

2016-08-03         Arnold D. Robbins     <arnold@skeeve.com>

	Remove typed regexes until they can be done properly.

	* NEWS: Updated.
	* awk.h (enum nodevals): Remove Node_typedregex.
	(force_string, force_number): Remove check for Node_typedregex.
	* awkgram.y (TYPED_REGEXP): Remove token.
	(grammar): Remove productions related to typed regexps. 
	(yylex): Don't find a typed regex or return it.
	(valinfo): Remove code for Node_typedregex.
	* builtin.c (do_length, do_print, call_sub, call_match,
	call_split_func, do_typeof): Remove code for Node_typedregex.
	* debug.c (watchpoint_triggered, print_memory): Remove code
	for Node_typedregex.
	* eval.c (nodetypes, setup_frame): Remove code for Node_typedregex.
	* interpret.h (r_interpret): Remove code for Node_typedregex.
	* profile.c (pprint): Remove code for Node_typedregex.
	(pp_strong_regex): Removed.
	(pp_string_or_strong_regex): Remove code for Node_typedregex.
	* re.c (re_update): Remove code for Node_typedregex.

2016-08-01         Arnold D. Robbins     <arnold@skeeve.com>

	* README, NEWS: Mark DJGPP port as unsupported.

2016-08-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* mpfr.c (mpg_tofloat): Always set precision to avoid hysteresis effects
	from previous calculations using the same temporary mpfr variables.

2016-08-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* mpfr.c (default_prec): Add new static variable to show current PREC
	setting in effect.
	(init_mpfr, set_PREC): Save mpfr_set_default_prec argument in
	default_prec.
	(do_mpfr_func): If the argument's precision exceeds the default
	precision, boost the result's precision to match it. This fixes a
	bug where we used to copy the argument's precision, regardless of
	whether it was higher or lower than the PREC setting.

2016-07-24         Norihiro Tanaka      <noritnk@kcn.ne.jp>

	* re.c (research): Now that the dfa matcher correctly runs even
	in multibyte locales, try it if even if need_start is true.
	However, if start > 0, avoid dfa matcher, since it can't handle
	the case where the search starts in the middle of a string.

	Unrelated:

	* eval.c (load_casetable): Reset casetable[i] to `i' if i
	should not be mapped to upper case. Fixes inconsistencies between
	dfa and regex in some single bytes locales; notably el_GR.iso88597.

2016-07-23         Arnold D. Robbins     <arnold@skeeve.com>

	Make result of close on a pipe match result of system.
	Thanks to Mike Brennan for the encouragement.

	* awk.h (sanitize_exit_status): Declare routine.
	* builtin.c (sanitize_exit_status): New routine.
	(do_system): Use it.
	* io.c (close_rp): Use it on pclose result.
	(gawk_pclose): Use it.

2016-07-23         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_print): Improve logic for formatting
	numeric values.

2016-07-19         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* eval.c (set_LINT): Simplify the code considerably.

2016-07-19         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (shadow_funcs): Change test at end to be
	`lintfunc == r_fatal' instead of `lintfunc != warning'.
	Thank to Andrew Schorr for the suggestion.

2016-07-18         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (locale_dir): New variable, init to LOCALEDIR (set by
	configure).
	(set_locale_stuff): Move calls to bindtextdomain and
	textdomain to here; they must be done after calling setlocale.
	Use locale_dir instead of LOCALEDIR.
	(main): Move call to set_locale_stuff() to before parsing arguments.
	Check for GAWK_LOCALE_DIR env var and use it if there. If doing
	locale debugging, call set_locale_stuff again if arg parsing changed
	the locale.

	Unrelated:

	* dfa.c: Sync with GNU grep.

	Unrelated:

	* config.sub: Updated from GNULIB.

2016-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (set_LINT): Reset lintfunc to `warning' for LINT="invalid".
	Thanks to Andy Schorr for the report.

2016-07-08         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Restore previous comment about unterminated strings, since
	I am removing the string termination patches from field.c
	(free_api_string_copies): Declare new gawkapi function.
	* builtin.c (do_mktime, do_system): Restore temporary string
	termination to protect against unterminated field values.
	(nondec2awknum): Remove comment about unnecessary termination.
	* eval.c (posix_compare): Restore temporary string termination.
	* field.c (databuf): Remove struct, no longer needed.
	(set_field): Remove memcpy for string termination, since we will support
	unterminated field string values.
	(rebuild_record): Ditto. Also no need to allocate space for terminated
	string copies.
	(allocate_databuf): Remove function, since memory management can again
	be done inside set_record.
	(set_record): Restore inline buffer management logic.
	(reset_record): Remove calls to allocate_databuf, since we no longer
	need space for making terminated copies of field strings.
	* gawkapi.c (free_api_string_copies): New function to free strings
	that we made to provide terminated copies to API functions.
	(assign_string): New function to convert a string to an awk_value,
	making sure to copy it if we need to terminate it.
	(node_to_awk_value): Use assign_string to return string values with
	NUL termination protection.
	* int_array.c (is_integer): Restore temporary string termination.
	* interpret.h (Op_push_i): Ditto.
	(Op_ext_builtin): After external function returns, call
	free_api_string_copies to free temporary string copies.
	* mpfr.c (force_mpnum): Restore temporary string termination.
	* node.c (r_force_number, get_ieee_magic_val): Ditto.

2016-07-08         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

	Unrelated:

	* builtin.c (do_print): Coding style change.  (This change obsoleted
	by earlier changes in the fixtype branch.)

2016-07-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Modify comments to indicate that MAYBE_NUM will now be
	left enabled to indicate strnum values by the NUMBER|MAYBE_NUM
	combination, whereas STRING|MAYBE_NUM indicates a potential strnum.
	(fixtype): Modify MAYBE_NUM test to avoid calling force_number if
	NUMCUR is already set.
	* builtin.c (do_typeof): Call fixtype to resolve argument type.
	This forces parsing of numeric strings, so there's a performance
	penalty, but we must do this to give a correct result. The meaning
	of "strnum" changes from "potential strnum" to "actual strnum".
	* eval.c (set_TEXTDOMAIN): Remove some dead code left over from last
	patch.
	* int_array.c (is_integer): When a MAYBE_NUM is converted successfully
	to a NUMBER, leave the MAYBE_NUM flag enabled.
	* mpfr.c (mpg_force_number): Ditto.
	* node.c (r_force_number): Ditto.

2016-07-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Modify stptr comment to indicate that all strings are now
	NUL-terminated.
	* builtin.c (do_mktime): Remove unnecessary logic to terminate
	the string with '\0' temporarily.
	(do_system) Ditto.
	(nondec2awknum): Add a comment about termination.
	* eval.c (posix_compare): Remove logic to terminate strings temporarily.
	(set_ORS): No need to terminate ORS, since the string node is already
	terminated. What gave us the right to modify that node anyway?
	(fmt_index): Remove code to terminate string. This seems to have been
	invalid anyway, since we don't own that memory.
	(set_TEXTDOMAIN): Do not terminate TEXTDOMAIN string, since the node
	is already terminated. We didn't have the right to modify that node
	anyway.
	* gawkapi.c (node_to_awk_value): Add assert checks to confirm that the
	string is NUL-terminated.
	* gawkapi.h: Modify awk_string comment to indicate that strings are
	always terminated with '\0'.
	* int_array.c (isinteger): Remove unnecessary logic to terminate string
	with '\0' temporarily.
	* interpret.h (Op_push_i): Ditto.
	* io.c (nextfile): Remove string termination. We didn't own that memory
	anyway.
	* mpfr.c (force_mpnum): Remove unnecessary logic to terminate the
	string with '\0' temporarily.
	* node.c (r_force_number): Remove NUL termination around strtod call,
	since we already know that there is either a white space or '\0'
	character there. Either one will stop strtod.
	(get_ieee_magic_val): Ditto.
	* profile.c (pp_number): No need to terminate string returned by
	r_format_val.

2016-07-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (Op_field_spec): Now that all $n field values are
	NUL-terminated, there is no reason to call dupnode for $n where n > 0.
	This saves malloc and copying overhead, thereby more than offsetting the
	performance hit of the additional copying and NUL-termination in the
	last patch to field.c. It also eliminates repeated parsing in cases
	where $n, for n > 1, was accessed more than once in a numeric context,
	so the new approach should be a performance win.

2016-07-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Make sure that all field values, and therefore all strings inside gawk,
	are terminated with a '\0' character!

	* field.c (databuf): New static struct to hold info about our buffer to
	contain the field string values.
	(allocate_databuf): New function to make sure the databuf is large
	enough to hold $0 and copies of $1 through $NF.
	(set_field): Copy $n into free space previously allocated in databuf
	and add a '\0' at the end.
	(rebuild_record): Call allocate_databuf to ensure sufficient space
	for copying non-malloced field values. When copying field values,
	use databuf to create a NUL-terminated copy.
	(purge_record): New function extracted from reset_record to initialize
	$1 through $NF to null values.
	(set_record): Buffer management moved to new allocate_databuf function.
	Call purge_record instead of reset_record, since reset_record contains
	some extra logic not needed in this case.
	(reset_record): Call purge_record to do most of the work, and call
	allocate_databuf to make sure we have a big enough buffer to contain
	copies of the $1 through $NF.

2016-07-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Renumber flags to remove gap created when FIELD was removed.

2016-07-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (rebuild_record): Need to set MALLOC flag if we allocate
	memory for a residual field node with valref > 1.

2016-07-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (rebuild_record): Do not bother to create new field nodes
	to replace malloc'ed nodes when rebuilding $0.

2016-07-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (FIELD): Remove unnecessary flag.
	(MALLOC): Move definition to join the others, and improve the comment.
	* array.c (value_info): Replace FIELD test with MALLOC test.
	* eval.c (flags2str): Remove FIELD flag.
	* field.c (init_fields): Remove FIELD bit from Null_field->flags.
	(set_field): Remove FIELD bit from flags.
	(rebuild_record): Test against MALLOC instead of FIELD. If a field
	node has valref > 1, we should make a copy, although I don't think
	it is valid for this to happen.
	(set_record): Remove FIELD bit from flags.
	* interpret.h (UNFIELD): Add comment, and test MALLOC flag instead of
	FIELD. Remove probably buggy code to disable the FIELD flag when
	valref is 1; that would have created a node where neither the FIELD
	nor MALLOC flag was set, which seems invalid.
	* node.c (r_dupnode): Remove code disabling FIELD flag.

2016-07-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (force_string_fmt): New inline function to get the string
	representation in a requested format.
	(force_string): Reimplement as a macro using force_string_fmt function.
	(force_string_ofmt): New macro to get a value's OFMT representation.
	* builtin.c (do_print): Use new force_string_ofmt macro instead of
	duplicating the logic inline.

2016-07-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* str_array.c (str_lookup): There is no need to worry about the
	MAYBE_NUM flag, since the code has been patched to make sure to
	preserve the string value of strnum values, and the integer array
	code should no longer mistakenly claim a strnum integer with a
	nonstandard string representation.

2016-07-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (rebuild_record): Revert warning message regarding flags,
	since I'm not yet totally confident that it is invalid to have FIELD
	and MALLOC set at the same time.

2016-07-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* field.c (rebuild_record): Do not turn off the STRING flag when
	copying a FIELD node, and issue a warning if MALLOC is enabled.

2016-07-01         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (value_info): Print something reasonable when stfmt
	is -1.
	* mpfr.c (mpg_format_val): Don't cast index to char.
	* node.c (r_format_val): Ditto.
	Thanks to Andrew Schorr for pointing these out.

	Unrelated:

	* gawkapi.c (api_warning): Fix the comment header.
	(api_lintwarn): Factor out the call to va_end to after the if.

	Unrelated:

	* symbol.c (get_symbols): Add FUNCTAB and SYMTAB to the list
	for the -d option.
	* awkgram.y (dump_vars): Allow "-" to mean print to stdout.
	Thanks to Hermann Peifer for the reports.

2016-06-30         Arnold D. Robbins     <arnold@skeeve.com>

	* node.c (r_force_number): Coding style change.

2016-06-30         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (STFMT_UNUSED): New define indicating that the string
	representation does not depend on CONVFMT or OFMT.
	(force_string): Use STFMT_UNUSED to improve code clarity.
	* array.c (value_info): Fix stfmt logic.
	* builtin.c (do_print): Use STFMT_UNUSED to improve code clarity.
	* field.c (set_record): Ditto.
	* gawkapi.c (api_sym_update_scalar): Ditto.
	* int_array.c (is_integer): Check stfmt equals STFMT_UNUSED before
	bothering to inspect the string.
	* mpfr.c (mpg_format_val): Use STFMT_UNUSED to improve code clarity.
	Remove buggy cast to char in stfmt assignment.
	* node.c (r_format_val): Ditto.
	* str_array.c (str_lookup): Use STFMT_UNUSED to improve code clarity.
	* symbol.c (check_param_names): Ditto.

2016-06-29         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_force_number): Optimize by trimming leading and trailing
	white space before we inspect the string contents.
	(get_ieee_magic_val): Must terminate the string with '\0' before
	calling strtod.

2016-06-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_string): Add comment about the potential lack of
	NUL-termination.

2016-06-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h: Add a comment regarding the potential lack of NUL-termination
	for Node_val strings.

2016-06-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_format_val): Do not free stptr unless STRCUR is set.
	This is safer than testing for non-NULL stptr, since, for example,
	pp_number copies a node and calls r_format_val, but does not bother
	to set stptr to NULL beforehand.

2016-06-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_force_number): When checking for trailing spaces, protect
	against running off the end of the string.
	* mpfr.c (force_mpnum): Ditto.

2016-06-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_print): There's actually no reason to test whether a
	value is a number, since the STRCUR flag and stfmt value contain all
	the necessary info, as in awk.h:force_string.

2016-06-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_print): Do not use OFMT to print strnum values. We
	accomplish this by calling format_val for a NUMBER only
	if there is no string currently available, or if stfmt equals
	neither -1 nor OFMTidx.

2016-06-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Edit some comments. Add others. Minor coding style changes.
	* builtin.c (format_tree): Restore a comment.
	(do_mktime): Restore saving/restoring of byte after format string.
	(do_sub): Coding style. Use %.*s in warning message.
	(nondec2awknum): Restore saving/restoring of byte after string value
	being converted.
	* eval.c: Minor coding style edits.
	* int_array.c (is_integer): Fix order of checks for not
	updating string value: check length == 0 before testing values.
	Coding style edits.
	* mpfr.c (do_mpfr_strtonum): Coding style edits.
	* node.c (r_force_number): Restore saving/restoring of byte after
	string value being converted. Edit comments some.

2016-06-26         Arnold D. Robbins     <arnold@skeeve.com>

	Repair change of 2015-08-25 to handling of MAYBE_NUM.
	* mpfr.c (mpg_force_number): Just clear MAYBE_NUM.
	* node.c (r_force_number): Clear STRING separately after
	setting NUMBER.

	Thanks to Andrew Schorr for reporting the problem.
	A test case will eventually be merged into master.

	Only in stable and master.

2016-06-20         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_strftime): Call fixtype before checking flags for
	STRING type.
	(do_print): Call fixtype before checking whether argument is a NUMBER.
	* eval.c (set_BINMODE): Call fixtype before checking value type.
	No need to call force_number if the flags say it's a number.
	(r_get_field): Fix lint check for non-numeric argument.
	* io.c (redirect): Call fixtype before checking whether it's a string.

2016-06-18         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_force_number): Fix typo in comment.

2016-06-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Add comment headers for several functions.
	* builtin.c (nondec2awknum): Actually set a '\0' before
	calling to strtod() so that the save and restore do something.

2016-06-15         Arnold D. Robbins     <arnold@skeeve.com>

	* config.sub: Update from GNULIB.

2016-06-14         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (boolval): New inline function to standardize testing whether
	a node's value is true.
	* builtin.c (do_strftime): Use boolval to handle 3rd argument.
	* eval.c (set_IGNORECASE, eval_condition): Use new boolval function.
	* io.c (pty_vs_pipe): Use new boolval function.

2016-06-14         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (do_strftime): Fix handling of 3rd argument to work
	as a standard boolean: non-null or non-zero.

2016-06-14         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (node_to_awk_value): When caller requests AWK_SCALAR
	or AWK_UNDEFINED, we need to call fixtype before we check the type.

2016-06-13         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y: Eliminate STRCUR tests. Must use STRING to test whether
	a scalar is a string.

2016-06-12         Andrew J. Schorr     <aschorr@telemetry-investments.com>
	
	* awk.h: Improve comment about STRING and NUMBER type assignment.
	(nondec2awknum): Add endptr argument.
	(fixtype): New inline function to clarify a scalar's type.
	* array.c (sort_up_value_type): Call fixtype before checking the value
	types.
	* awkgram.y (yylex): Pass NULL endptr argument to nondec2awknum.
	(valinfo): Remove dead tests: either STRING or NUMBER or both
	must be set, so there's no reason to continue with checks for NUMCUR or
	STRCUR.
	* builtin.c (do_exp, do_int, do_log, do_sqrt, do_sin, do_cos, do_srand):
	Fix lint check for non-numeric argument.
	(do_string): Fix lint check for 1st and 2nd args being strings.
	(do_length): Fix assert to allow for Node_typedregex.
	Fix lint check for non-string argument.
	(format_tree): Fix type detection for '%c' arguments.
	(do_strftime): Fix lint check for non-numeric 2nd argument and
	lint check for non-string 1st argument.
	(do_mktime): Fix lint check for non-string argument. Eliminate useless
	logic to save and restore terminating NUL.
	(do_system, do_tolower, do_toupper): Fix lint check for non-string
	argument.
	(do_atan2, do_lshift, do_rshift, do_and, do_or, do_xor, do_compl,
	do_intdiv): Fix lint checks for non-numeric args.
	(do_sub): Attempt to clean up treatment of 3rd argument to gensub
	despite vague documentation of expected behavior.
	(do_strnum): Fix bug in number detection logic, and pass new endptr
	arg to nondec2awknum.
	(nondec2awknum): Add endptr argument so caller can detect how much
	of the string was consumed. Eliminate unnecessary logic to save
	and restore terminating NUL char.
	(do_typeof): Use a switch to specify which cases are supported, and
	issue a warning message when a corrupt type is detected.
	* debug.c (print_memory): At least one of NUMBER and STRING should
	be set, so no need to check for NUMCUR or STRCUR in addition.
	* eval.c (cmp_nodes): Use fixtype function to fix arg types.
	(set_IGNORECASE): Fix logic for acting on value type. Note that
	setting IGNORECASE to a string value of "0" with NUMCUR set now enables
	ignorecase, so that's a subtle change in behavior that seems to match
	the docs.
	(set_LINT): Try to clean up configuration logic based on type.
	* ext.c (get_argument): Remove unused variable pcount.
	* gawkapi.c (node_to_awk_value): Remove pointless test for NUMCUR
	after calling force_number. Similarly, no need to test for STRCUR
	after calling force_string.
	* int_array.c (is_integer): Reject cases where a string value is
	present that will not be correctly regenerated from the integer;
	in particular, this could happen where blank space padding is present,
	leading zeroes are present, or for hex or octal values.
	Also fix some bugs where a strnum was converted to a NUMBER without
	turning off the STRING bit.
	* io.c (redirect_string): Make lint warning message more accurate.
	(redirect): Change not_string test to use STRING bit, not STRCUR.
	(pty_vs_pipe): Use fixtype to correct logic for detecting whether a
	value is anumber.
	* mpfr.c (mpg_force_number): If NUMCUR is set, there's no need to
	test is_mpg_number. If it's not, the NODE is corrupt and we've got
	bigger problems. Fix flag manipulation logic. Always set NUMCUR and
	clear MAYBE_NUM, 
	(set_PREC): Fix logic using fixtype function.
	(do_mpfr_atan2, do_mpfr_intdiv): Fix lint check for non-numeric
	arguments.
	(do_mpfr_func, do_mpfr_int, do_mpfr_compl, get_intval, do_mpfr_srand):
	Fix lint check for non-numeric argument.
	(do_mpfr_strtonum): Use fixtype and stop testing for NUMCUR bit.
	* node.c (r_force_number): Eliminate pointless save and restore of
	terminating NUL char. Always set NUMCUR and clear MAYBE_NUM, and
	convert STRING to NUMBER if appropriate, fixing bugs in flag
	manipulations. For non-decimal data, need to consider whether there
	is trailing non-numeric data in deciding whether a MAYBE_NUM should
	be converted to a NUMBER, so take advantage of new endptr arg
	to nondec2awknum.

2016-06-14         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Fix sub for long runs of backslashes.
	Thanks to Mike Brennan for the report.
	
	Unrelated:
	* ext.c (get_argument): Remove unused variable pcount.

2016-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Get latest from Gnulib master.
	* main.c (UPDATE_YEAR): Bump to 2016.

2016-06-09         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

	Unrelated:

	* configure.ac: Move AM_CONDITIONAL[ENABLE_EXTENSIONS] outside
	the enclosing if. Thanks to Assaf Gordon <assafgordon@gmail.com>
	for the report.

2016-06-08         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (lookup): If got Node_val, it's a non-variable
	in SYMTAB, return NULL. Can affect watchpoints in the debugger,
	maybe other places. Thanks to Hermann Peifer for the
	test case and report.

2016-06-05         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2016-06-01         Arnold D. Robbins     <arnold@skeeve.com>

	* nonposix.h (getpgrp): Wrap declaration in ifdef so it doesn't
	mess things up on POSIX systems (like Solaris). Thanks to
	Nelson Beebe for the report.
	* node.c (is_hex): New function to check for 0x preceded by
	optional sign.
	(r_force_number): Use it. Thanks to Mike Brennan for the report.

2016-05-30         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_ext_func_t): Rename num_expected_args to
	max_expected_args, and explain in the comment that it doesn't really
	matter.
	* ext.c (make_builtin): Replace num_expected_args with
	max_expected_args.
	(get_argument): Do not check whether the argument number exceeds
	the maximum expected by the function.

2016-05-30         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (arg_assign): Fully bracket ifdefs around call
	to force_number. Thanks to Andrew Schorr for pointing out
	that force_number was called only if LC_NUMERIC was defined.
	
	Lots of files: Update copyright date.

	* field.c (set_FS): Handle FS = "\0" if RS = "". Thanks to
	Janis Papanagnou for the report.

	* getopt.c, getopt.h, getopt1.c, getopt_int.h: Sync with GLIBC.

2016-05-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (get_actual_argument): Remove unused "optional" argument.
	(get_scalar_argument, get_array_argument): Change macro definition to
	remove 3rd "optional" argument.
	* ext.c (get_actual_argument): Remove unused "optional" argument.
	* gawkapi.c (api_get_argument, api_set_argument): Remove unused final
	argument to get_array_argument and get_scalar_argument.

2016-05-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h [fatal]: Make parentheses and use of indirection
	consistent with warning and lintwarn. Thanks to Andrew Schorr
	for pointing this out.
	* str_array.c (str_lookup): Move test for MAYBE_NUM to where
	we duplicate the subscript. Removing it across the board is
	wrong if there are multiple references to the value. Thanks
	to Andrew Schorr for discussion and test case.

2016-05-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (get_actual_argument): Add an initial argument containing 
	the (NODE *) previously returned by get_argument. This allows us to
	eliminate a call to get_argument from inside get_actual_argument.
	(get_scalar_argument, get_array_argument): Change macro definition to
	add an initial node argument to pass through to get_actual_argument.
	* ext.c (get_actual_argument): Add initial (NODE *) argument to contain
	the value previously returned by get_argument. This allows us to
	avoid repeating the call to get_argument. We can also eliminate the
	check for a NULL value, since the caller did that already.
	* gawkapi.c (api_get_argument): Pass (NODE *) returned by get_argument
	to get_array_argument and get_scalar_argument.
	(api_set_argument): Pass (NODE *) returned by get_argument to
	get_array_argument.

2016-05-25         Manuel Collado        <mcollado2011@gmail.com>.

	* gawkapi.c (api_nonfatal): New function.
	(api_impl): Include it.
	* gawkapi.h (struct gawk_api): Add api_nonfatal member.
	(nonfatal): New macro.

2016-05-12         Arnold Robbins       <arnold@skeeve.com>

	* str_array.c (str_lookup): Remove MAYBE_NUM from subscript flags.
	Bug reported by Andres Legarra <Andres.Legarra@toulouse.inra.fr>.

	Unrelated: Fix issues with SIGPIPE. Reported by
	Ian Jackson <ijackson@chiark.greenend.org.uk>.

	* builtin.c (do_system): Reset/restore SIGPIPE to/from default around
	call to system.
	* io.c (redirect, gawk_popen [PIPES_SIMULATED]): Same.

2016-05-12  Eli Zaretskii  <eliz@gnu.org>

	* nonposix.h: Add prototypes for POSIX functions emulated in pc/*
	files.

2016-05-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (r_interpret): Op_ext_builtin. No need to test whether
	op == Op_ext_builtin, since we wouldn't be here otherwise.

2016-05-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (format_tree): Do not waste a byte at the end of a string.

2016-05-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* builtin.c (format_tree): After the string has been rendered, use
	realloc to shrink the buffer to the needed size. Otherwise, the minimum
	buffer size of 512 bytes can result in lots of wasted memory if many
	sprintf results are stored in an array.

2016-05-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (gawk_api_major_version, gawk_api_minor_version): Add
	CPP #define values to support conditional compilation.

2016-05-02         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Sync with grep.
	* re.c (research): Adjust type of try_backref.

2016-05-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (success_node): Declare.
	* array.c (success_node): Define.
	* cint_array.c, int_array.c, str_array.c: Use `& success_node'
	instead of `(NODE **) ! NULL' to indicate success throughout.
	Thanks to Pat Rankin for the cleanup suggestion.

2016-04-27         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (set_RS): Use rs1scan if do_traditional, even if length
	of RS is > 1.  Bug reported by Glauco Ciullini
	<glauco.ciullini6245@gmail.com>.

2016-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2016-04-11         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.c: Replace _GL_ATTRIBUTE_PURE with
	__attribute__.

2016-04-11         Arnold D. Robbins     <arnold@skeeve.com>

	* regexec.c: Stamp out last remaining use of __attribute.
	* regcomp.c: Undo change of 2016-01-24 when parsing single-byte
	ranges. Go back to treating them as bytes and not as characters.
	The change broke things on Windows in non-UTF-8 character sets.
	* mbsupport.h (mbstate_t): Define to int.
	Update copyright.

2016-04-10         John E. Malmberg      <wb8tyw@qsl.net>

	* regex_internal.c: Use _GL_ATTRIBUTE_PURE macro

2016-04-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (two_way_close_type): Move here from io.c.
	(close_rp): Add declaration.
	* builtin.c (do_printf): Call close_rp before fatal message when
	attempting to write the closed write end of a two way pipe.
	(do_print): Ditto.
	(do_print_rec): Ditto.
	* io.c (do_getline_redir): Same, for reading closed read end.
	(close_rp): Make not static.

2016-04-07  Eli Zaretskii  <eliz@gnu.org>

	* nonposix.h (WEXITSTATUS, WIFEXITED, WIFSIGNALED, WTERMSIG)
	(WIFSTOPPED, WSTOPSIG) [__MINGW32__]: New macros to replace the
	missing header sys/wait.h.
	(w32_status_to_termsig): Add prototype.

	* builtin.c (do_system) [__MINGW32__]: Compute the exit status of
	'system' differently under --traditional, as the low 8 bits are
	the most interesting.

2016-04-06         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_printf): Allow a write to the closed write-end of
	a two-way pipe to be nonfatal if NONFATAL is set for it.
	(do_print): Ditto.
	(do_print_rec): Ditto.
	* io.c (do_getline_redir): Same thing for reading from a closed
	read end of a two-way pipe. Fatal error.

2016-04-04         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_fflush): Add warning for flush to two-way
	pipe where write end was closed.
	* io.c (flush_io): Add some braces for the for loop.

2016-04-02         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_printf): If the redirection is two way but the
	fp is NULL, it means we're writing to the closed write-end of
	a two-way pipe. Issue a fatal error message.
	(do_print): Ditto.
	(do_print_rec): Ditto.
	* io.c (do_getline_redir): Same thing for reading from a closed
	read end of a two-way pipe. Fatal error.
	* NEWS: Updated.

2016-03-27         Stephen Davies        <sdavies@sdc.com.au>

	* awkgram.y (get_comment): Strip CRs from comment. Strip
	off trailing newlines.

2016-03-21         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Improve handling of comment after
	and if statement without an else.

2016-03-19         Arnold D. Robbins     <arnold@skeeve.com>

	Considerable improvements to handling of comments when pretty
	printing, particularly for end-of-line comments.

	* awkgram.y (prior_comment, comment_to_save): New variables.
	(add_pending_comment): New function.
	(grammar): Jump through lots more hoops to capture comments.
	Due to shift-reduce parsing, there can be up to two comments
	captured and waiting to be saved; be sure to get them both and
	at the right times.  This is difficult since comments have no
	real syntactic existence. Call add_pending_comment on most of
	the simple statements.
	(get_comment): Save a pre-existing comment in prior_comment.
	(split_comment): Use comment_to_save instead of `comment'.
	* profile.c (end_line): Change to return the instruction after
	the comment that gets printed; adjust return type.
	(pprint): Add skip_comment static variable. Adjust logic for
	skipping an end-of-line comment; only do it if skip_comment is
	true. This is set to true in places where we can't use the
	return value from end_line().  Call end_line() in many more places.
	(pp_func): Handle end-of-line comments after a function header.

2016-03-17         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_instruction): For Op_comment, improve notation as
	to whether it's a full comment or an end of line comment.

2016-03-14         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (socketopen): For SOCK_DGRAM, set read_len to sizeof
	remote_addr. Makes UDP more or less work again.
	Thanks to Juergen Kahrs for the fix.

2016-03-11         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_instruction): Normalize printing of comment dump.

2016-03-10         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_system): Further improvements. Catch core dump
	flag.

2016-03-11         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_system): Improve return values of system().

2016-03-08         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (print_instruction): Fix duplicate case not caught
	by TinyCC. Grrr.

2016-03-07         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (print_instruction): Further improvements in
	instruction dump, especially for when pretty-printing.
	* builtin.c (do_system): Augment the logic for the return
	value so that death-by-signal info is available too.

2016-03-03         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_list): Unconditionally compute delimlen. Avoids
	compiler warning.

2016-03-02         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_instruction): Improvements in instruction dump
	for if and else.

2016-03-01         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_instruction): For Op_comment, add notation as
	to whether it's a full comment or an end of line comment.

2016-02-29         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_list): Handle the case of nargs equal to zero.
	Thanks to Hermann Peifer for the report.

2016-02-28         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Fix copy-paste error in else handling.
	Thanks to Michal Jaegermann for the report.

2016-02-23         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.rpath, config.sub: Update to latest
	from GNULIB.

2016-02-23         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Update full list of infrastructure tools.

2016-02-22        gettextize             <bug-gnu-gettext@gnu.org>

	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump to 0.19.7.

2016-02-21         Nelson H.F. Beebe     <beebe@math.utah.edu>

	* random.c [SHUFFLE_BITS, SHUFFLE_MAX, SHUFFLE_MASK]: New macros.
	(shuffle_init, shuffle_buffer): New static variables.
	(random_old): Renamed from random.
	(random): New function wrapping random_old and providing a
	shuffle buffer to increase the period. See the literature citations
	and other notes in the code.

2016-02-21         Arnold D. Robbins     <arnold@skeeve.com>

	* regexec.c (prune_impossible_nodes): Remove attribute that
	keeps it from compiling with 32 bit GCC. Who the heck knows
	why or how. Sigh. Double sigh.

2016-02-20         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex.c, regex.h, regex_internal.c, regex_internal.h,
	regexec.c: Sync with GLIBC, mostly prototype changes.

2016-02-18         Arnold D. Robbins     <arnold@skeeve.com>

	Fix profile / pretty-printing to chain else-ifs.

	* profile.c (pprint): Change third argument into a set of flags
	for in the for header or in an else if. Adjust case Op_K_else to
	make the right checks and format the code properly. In Op_K_if
	clear the flag so that any following else gets indented properly.
	Adjust all calls.

2016-02-14         Arnold D. Robbins     <arnold@skeeve.com>

	* README, NEWS: Updated to reflect use of Texinfo 6.1.

	Unrelated:

	* configure.ac: Switch to AC_PROG_CC_C99 to enable C99
	compilation and features.
	* dfa.c: Sync with GNU grep, go back to C99 style declarations
	at point of use.

2016-02-05         Arnold D. Robbins     <arnold@skeeve.com>

	Make optimization (constant folding and tail call recursion)
	be on by default.

	* awkgram.y (common_exp): Only do concatenation of two strings(!)
	* main.c (do_optimize): Init to true.
	(optab): Add new -s/--no-optimize option.
	(usage): Update message to include it.
	(parse_args): Parse it. Set do_optimize to false if pretty
	printing or profiling.
	* NEWS: Updated.

2016-01-28         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (SUBDIRS): Include extras. Otherwise dist does
	doesn't work.

2016-01-27         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (GAWK_AC_AIX_TWEAK): Remove call.
	* configure: Regenerated.
	* io.c (GAWK_AIX): Check _AIX instead.
	* custom.h (_AIX): Add define of _XOPEN_SOURCE_EXTENDED.

	Unrelated:

	* configure.ac: Remove old stuff for ISC Unix, no longer needed.
	* configure: Regenerated.

2016-01-25         John E. Malmberg      <wb8tyw@qsl.net>

	* io.c (redirect): Need to call close_one more than once after
	  running out of file handles.

2016-01-25         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Document VMS support updated.

2016-01-24         Arnold D. Robbins     <arnold@skeeve.com>

	Regex: treat [x] as x if x is a unibyte encoding error.
	This change removes an ifdef GAWK.

	* regcomp.c (parse_byte) [ !_LIBC && RE_ENABLE_I18N]: New function.
	(build_range_exp) [ !_LIBC && RE_ENABLE_I18N]: Use it.
	From Paul Eggert  <eggert@cs.ucla.edu>.

2016-01-22         Arnold D. Robbins     <arnold@skeeve.com>

	* regexec.c (prune_impossible_nodes): Remove all attributes, on
	both declaration and definition.  Fixes a Linux Mint 17 compilation
	braino reported by Antonio Colombo.
	* regex_internal.h (test_malloc): Add cast to silence a warning
	on the same system.
	(test_realloc): Ditto.

2016-01-20         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.h [attribute_hidden]: Remove definition.
	* regcomp.c [attribute_hidden]: Remove uses. Not needed since
	the variables are static. Thanks to Paul Eggert for pointing
	this out.

2016-01-18         Paul Eggert  <eggert@cs.ucla.edu>

	Diagnose ERE '()|\1'
	Problem reported by Hanno Boeck in: http://bugs.gnu.org/21513

	* lib/regcomp.c (parse_reg_exp): While parsing alternatives, keep
	track of the set of previously-completed subexpressions available
	before the first alternative, and restore this set just before
	parsing each subsequent alternative.  This lets us diagnose the
	invalid back-reference in the ERE '()|\1'.

	Unrelated:  General minor cleanups (spelling, code) from Gnulib:

	* regex.h, regex_internal.c, regex_internal.h, regexec.c: Minor
	cleanups.

2016-01-14         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (r_get_lhs): If original array was Node_var_new,
	assign value that is dupnode of Nnull_string and not
	Nnull_string directly. Fixes core dump reported by
	ruyk <Lonely.ruyk@mail.ru>.

	Unrelated:

	* ChangeLog: Cleanup spurious extra whitespace.

2016-01-03         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (GAWK_AC_LINUX_ALPHA): Remove call.
	* configure: Regenerated.
	* NEWS: Document removal of support for GNU/Linux on Alpha.

2016-01-02         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (add_utf8_anychar): Minor change in declaration of
	utf8_classes to keep Tiny CC happy.  Also syncs with grep.
	* dfa.h: Sync with grep (update copyright year).

2015-12-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (mk_condition): Revise to correctly handle
	empty else part for pretty printing. Bug report by
	ziyunfei <446240525@qq.com>.

2015-12-20         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (nonfatal): New static constant string.
	* is_non_fatal, is_non_fatal_redirect: Use it.

2015-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (two_way_open): Remove unneeded close of slave in the
	parent.

2015-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_number): Move count into ifdef for MPFR. Avoids
	an unused variable warning if not compiling for MPFR.

	Unrelated:

	* io.c (two_way_open): If using a pty instead of pipes, open the
	slave in the child. Fixes AIX and doesn't seem to break GNU/Linux.

2015-11-26         Arnold D. Robbins     <arnold@skeeve.com>

	* command.y (cmdtab): Add "exit" as synonym for "quit".
	Suggested by Joep van Delft <joepvandelft@xs4all.nl>.
	* NEWS: Document this.

2015-11-24         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (debug_pre_execute): Fix to check watchpoints before
	checking breakpoints. Gives more natural behavior for the user.
	* NEWS: Document this.
	Issue reported by Joep van Delft <joepvandelft@xs4all.nl>.

2015-10-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (nextc): Don't allow '\0' even if check_for_bad
	is false. Fixes a problem reported by Hanno Boeck <hanno@hboeck.de>.

	Unrelated:

	* dfa.c: Sync with GNU grep.

2015-10-25         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Fix invalid write problems.
	Reported by Hanno Boeck <hanno@hboeck.de>.
	Only appeared in master. Harumph.

2015-10-16         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (SUBDIRS): Fix ordering so that
	make check directly after configure works properly.
	Thanks to Michal Jaegermann <michal.jnn@gmail.com>
	for the report.

	Unrelated:

	* dfa.c: Sync with GNU grep.

2015-10-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Fix invalid read problems.
	Reported by Hanno Boeck <hanno@hboeck.de>.

2015-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Bump version to 4.1.3a.

2015-09-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Diagnose multidimensional arrays for
	traditional/posix (fatal) or lint. Thanks to Ed Morton
	for the bug report.

2015-09-25         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub, config.rpath: Updated.

2015-09-18         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (fpat_parse_field): Always use rp->non_empty instead
	of only if in_middle. The latter can be true even if we've
	already parsed part of the record. Thanks to Ed Morton
	for the bug report.

2015-09-11	Daniel Richard G.	<skunk@iSKUNK.ORG>

	* regcomp.c: Include strings.h, wrapped in ifdef. Revise
	defines for BTOWC.
	* regex_internal.h: Remove ZOS_USS bracketing ifdefs.

2015-09-04         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_num): Use format_val to print integral values
	as integers. Thanks to Hermann Peifer for the report.

2015-08-28	Daniel Richard G.	<skunk@iSKUNK.ORG>

	* Makefile.am, configure.ac: Use an Automake conditional to
	enable/disable the "extensions" subdirectory instead of
	producing a stub Makefile therein from the configure script.
	* awk.h, custom.h, regex_internal.h: Removed z/OS-specific code
	that is no longer needed due to improvements in Gawk's general
	Autotools support.
	* awk.h: Allow <strings.h> to be #included together with
	<string.h> as this is required on some systems (z/OS).
	* io.c, configure.ac: <sys/select.h> is needed for select()
	and related bits on z/OS.
	* awk.h: Handle the redefinition of EXIT_FAILURE on z/OS in a
	more elegant/general way.
	* awkgram.y, command.y, configure.ac, eval.c,
	helpers/testdfa.c: Define and use the USE_EBCDIC cpp symbol
	instead of checking the value of 'a' whenever we want to know
	if we're on an EBCDIC system. Also, don't assume that z/OS
	necessarily means EBCDIC, as the compiler does have an ASCII
	mode (-qascii).
	* awkgram.y, command.y, configure.ac: On EBCDIC systems,
	convert singleton EBCDIC characters in the input stream to
	ASCII on the fly so that the generated awkgram.c/command.c in
	the distributed sources can be used, i.e. we don't have to
	require the user to build Bison and re-generate those files
	themselves. This implementation uses a z/OS-specific function
	(__etoa_l()) to do the conversion, but support for other
	systems can be added in the future as necessary.
	* io.c: No need to protect this block of "#if
	defined(HAVE_TERMIOS_H)" code from z/OS; it works just fine
	there.
	* configure.ac: Check for the "struct passwd.pw_passwd" and
	"struct group.gr_passwd" fields and conditionalize their use,
	as they don't exist on z/OS.  Needed for doc/gawktexi.in.

2015-08-25         Arnold D. Robbins     <arnold@skeeve.com>

	* node.c (str2wstr): Upon finding an invalid character, if
	using UTF-8, use the replacement character instead of skipping
	it. Helps match() and other functions work better in the face
	of unexpected data.  Make the lint warning an unconditional
	warning.

	Unrelated:

	* awk.h: Add explanatory comment on the flags related to
	types and values.
	* mpfr.c (mpg_force_number): If setting NUMBER, clear STRING also
	when clearing MAYBE_NUM.
	(set_PREC): Check STRCUR instead of STRING.
	* node.c (r_force_number): If setting NUMBER, clear STRING also
	when clearing MAYBE_NUM.

2015-08-15         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (dfamust): Restore c90 compat by moving some
	variable declarations to the top of the routine.

2015-08-12         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep. Yet again, again.

2015-08-02         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep. Yet again.

2015-07-21         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2015-07-18         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2015-07-08         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Sync with GNU grep.

2015-06-29         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): If gawk extension function is found as
	a function in a user-defined function body, treat it normally.
	Makes eval "print and(a, 1)" work in the debugger again.
	Thanks, yet again, to Hermann Peifer.
	* interpret.h (r_interpret): Op_subscript. UPREF if the
	element value is a typed regexp.  Thanks to Hermann Peifer.

2015-06-28         Arnold D. Robbins     <arnold@skeeve.com>

	Improve memory tracking of typed regexps.

	* awkgram.y (make_regnode): Set valref to 1.
	* interpret.h (r_interpret): Have Op_push_re upref typed regexp.
	* builtin.c (do_typeof): OK to deref typed regex.
	* awk.h (force_string): Do dupnode on the regexp text.

2015-06-26         Arnold D. Robbins     <arnold@skeeve.com>

	Remove support for old-style extensions.

	* awk.h (Node_old_ext_func, Op_old_ext_func): Removed.
	Remove all uses throughout the code.
	(load_old_ext, make_old_builtin): Remove declarations.
	* ext.c (load_old_ext, make_old_builtin): Removed.
	* awkgram.y (tokentab): Remove "extension" entry.
	* eval.c (Node_old_ext_funci, Op_old_ext_func): Remove from tables.
	* interpret.h (interpret): Remove stuff for old extensions.

	Unrelated:

	* builtin.c (do_typeof): Add support for strnum, distinguish
	untyped from unassigned, use "string" and "number". Thanks to
	Hermann Peifer for suggesting inclusion of strnum.

2015-06-25         Arnold D. Robbins     <arnold@skeeve.com>

	Further work straightening out memory management for typeof.

	* awk.h (DEREF): Add an assert.
	* builtin.c (do_typeof): Add comments, cases where not to deref.
	* debug.c (print_instruction): Add Op_push_arg_untyped.
	* interpret.h (r_interpret): Additional comments / tweaks for
	Op_push_arg_untyped.

	Unrelated. Make `x = @/foo/ ; print x' print something.

	* builtin.c (do_print): Check for Node_typedregex and handle it.
	Needed for adding test code.

	Unrelated. Typo fix.

	* debug.c (initialize_watch_item): Dupnode the right thing.

2015-06-22         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (snode): Make isarray not scalarize untyped parameters
	also.
	* profile.c (pprint): Add Op_push_arg_untyped.

	Improve debugger support for typed regexps.
	Thanks to Hermann Peifer for the bug report.

	* awkgram.y (valinfo): Add support for Node_typedregex.
	* debug.c (watchpoint_triggered): Handle Node_typedregex.
	(initialize_watch_item): Ditto.
	(print_memory): Ditto.

	Fix typeof to work on subarrays.  Thanks, yet again, to
	Hermann Peifer for the bug report.

	* builtin.c (do_typeof): Don't deref Node_var_array.

2015-06-21         Arnold D. Robbins     <arnold@skeeve.com>

	Fixes for typeof - Don't let typeof change an untyped variable
	into a scalar.

	* awk.h (opcodeval): Add Op_push_arg_untyped.
	* awkgram.y (snode): Separate out case for do_typeof, use
	Op_push_arg_untyped.
	* builtin.c (do_typeof): Arg will be equal to Nnull_string
	if it's untyped.
	* eval.c (optypes): Add Op_push_arg_untyped.
	* interpret.h (r_interpret): Add Op_push_arg_untyped handling.

2015-06-19         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_isarray): Minor edit to lint warning.
	* TODO: Updated.

2015-06-14         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex_internal.h, regexec.c: Sync with GLIBC.

	Unrelated:

	* regex_internal.c, regexec.c: __attribute --> __attribute__.

	Related:

	* regex_internal.h: Clean up defines for non-GCC for attribute;
	essentially sync it with GLIBC.

2015-06-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Finish converting "hard" regex to "typed" regex.

2015-05-31         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (posix_def_parse_field): Removed. It's no longer
	needed after updates to the POSIX standard. Thanks to
	Michael Klement <michael.klement@usa.net> for pointing this out.

2015-05-26  Paul Eggert  <eggert@Penguin.CS.UCLA.EDU>

	* floatcomp.c (count_trailing_zeros): New function.
	This compiles to a single TZCNT instruction on the x86-64.
	(adjust_uint): Use it to keep more high-order bits when
	some of the lowest-order bits are zero.  This implements
	the documented behavior: "If the result cannot be represented
	exactly as a C 'double', leading nonzero bits are removed one by
	one until it can be represented exactly."

2015-05-26         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c: Fix offsets so error messages come out correct
	once again.

2015-05-19         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.1.3: Release tar ball made.

2015-05-15         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* symbol.c (load_symbols): Plug minor memory leak by calling unref(tmp)
	on "identifiers" string after assoc_lookup is done with it.

2015-05-15         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* main.c (load_procinfo_argv): New function to save argv array values
	in PROCINFO["argv"][0..argc-1].
	(load_procinfo): Call load_procinfo_argv.

2015-05-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h, awkgram.y, builtin.c, eval.c profile.c, re.c:
	Change Node_hardregex to Node_typedregex everywhere.

2015-05-05         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Yet Another Fix for parsing bracket
	expressions. Thanks yet again to Andrew Schorr. Maybe it's
	even finally nailed down now.

	Unrelated:

	* config.guess, config.sub: Get latest versions.

	Make profiling for hard regexes work.

	* profile.c (pp_string_or_hard_regex): Renamed from pp_string.
	Add bool param for hard regex and add @ if so.
	(pp_string): New function, calls pp_string_or_hard_regex.
	(pp_hard_regex): New function, calls pp_string_or_hard_regex.
	(pprint): Adjust to print a hard regex correctly.

2015-05-01         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Make sure values are not null in param list.
	Avoids core dump for `function f(func, a) {}'. Thanks to
	Tibor Palinkas <libmawk@igor2.repo.hu>.

2015-04-30         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am: Take --program-prefix into account when
	installing/uninstalling the symlinks, especially 'awk'.
	Thanks to Steffen Nurpmeso <sdaoden@yandex.com> for
	the report.

	Unrelated:

	* awkgram.y (yylex): Yet Another Fix for parsing bracket
	expressions. Thanks again to Andrew Schorr.

2015-04-29         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.1.2: Release tar ball made.

2015-04-28         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (isarray): Add lint warning that isarray()
	is deprecated.

2015-04-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Rework the bracket handling from zero.
	Thanks to Michal Jaegermann for yet another test case.

	Unrelated:

	* eval.c (setup_frame): Restore call-by-value for $0. This was
	necessitated by the changes on 2014-11-11 for conserving
	memory use. Thanks to Andrew Schorr for the report and isolating
	the cause of the problem.

2015-04-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Make change of Jan 7 for parsing regexps
	work better. Thanks to Nelson Beebe.

2015-04-26         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep.

2015-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_strftime): For bad time_t values, return "".

2015-04-16         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* node.c (r_force_number): If strtod sets errno, then force the
	numeric value in node->numbr to zero. For subnormal values, strtod
	sets errno but does not return zero, and we don't want to retain
	those subnormal values.

2015-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	Let parameter names shadow the names of gawk additional built-ins.
	Make it actually work.

	* awkgram.y (want_param_names): Now an enum, there are three states.
	(grammar): Set states properly.
	(yylex): Improve checking logic.

2015-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Updated by autoupdate.
	* configure, aclocal.m4: Regenerated.
	* io.c, main.c, profile.c: Removed use of RETSIGTYPE.

2015-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_strftime): Use a double for the timestamp and
	check that the value is within range for a time_t.

	Unrelated:

	* regex_internal.h (test_malloc, test_realloc): Use %lu in printf
	format for error messages. Thanks to Michal Jaegermann for
	pointing this out.

	Unrelated:

	* NEWS: Updated.

2015-04-15         Arnold D. Robbins     <arnold@skeeve.com>

	Let parameter names shadow the names of gawk additional built-ins.

	* awkgram.y (want_param_names): New variable.
	(yylex): Check it before returning a built-in token.
	(grammar): Set and clear it in the right places.

2015-04-14         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_strftime): Restore checking for negative result and
	add check that time_t is > 0 --- means we're assigning a negative value
	to an unsigned time_t. Thanks again to Glaudiston Gomes da Silva
	<glaudistong@gmail.com>.

	If localtime() or gmtime() return NULL, return a null string.
	Thanks to Andrew Schorr.

	Unrelated:
	* builtin.c (call_sub): Fix for indirect gensub, 3 args now works.

	Unrelated:

	* builtin.c (do_sub): Improve some variable names for readability
	and add / expand some comments.

	Unrelated:

	* builtin.c (call_sub, call_match, call_split_func): Allow for
	regex to be Node_hardregex.

2015-04-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>
		   Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Make computations smarter; initial len
	to malloc, test for final amount after all matches done and
	need to copy in the final part of the original string.

2015-04-13         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c (analyze): Prevent malloc(0).
	* regex_internal.h (test_malloc, test_realloc): New functions
	that check for zero count.
	(re_malloc, re_realloc): Adjust to call the new functions for gawk.
	* regexec.c (build_trtable, match_ctx_clean): Replace malloc/free
	with re_malloc/re_free.

	Unrelated:

	* builtin.c (do_strftime): Disable checking timestamp value for less
	than zero. Allows times before the epoch to work with strftime.
	Thanks to Glaudiston Gomes da Silva <glaudistong@gmail.com>
	for raising the issue.

2015-04-12         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (efence): Make this link again.
	Thanks to Michal Jaegermann for pointing out the problem.

2015-04-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (yyerror): Rationalize buffer size computations. Remove
	old valgrind workarounds.
	* debug.c (gprintf): Rationalize buffer size computations.
	(serialize_subscript): Ditto.
	* io.c (iop_finish): Rationalize buffer size computations.
	* profile.c (pp_string): Correct space allocation computation.

2015-04-08        John E. Malmberg       <wb8tyw@qsl.net>

	* custom.h: VMS shares some code paths with ZOS_USS in
	building gawkfts extension.

2015-04-08         Arnold D. Robbins     <arnold@skeeve.com>

	Factor out opening of /dev/XXX files from /inet.
	Enable interpretation of special filenames for profiling output.

	* awk.h (devopen_simple): Add declaration.
	* io.c (devopen_simple): New routine.
	(devopen): Call devopen_simple as appropriate.
	* profile.c (set_prof_file): Call devopen_simple as appropriate,
	some additional logic to handle fd to fp conversion.

	Unrelated:

	* main.c (usage): Add a comment for translators.

2015-04-08  Eli Zaretskii  <eliz@gnu.org>

	* profile.c (set_prof_file): Interpret a file name of "-" to mean
	standard output.

2015-04-06         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (force_number): Add `!= 0' check to bitwise operation.
	* awkgram.y: Same, many places.
	(check_special): Simplify code for checking extension flags.

2015-04-05         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (install_builtins): If do_traditional is true, do not
	install gawk extensions flagged with GAWKX.  Similarly, if do_posix
	is true, do not install functions flagged with NOT_POSIX.
	This fixes a problem with spurious lint complaints about shadowing
	a global variable that is not valid in traditional or posix mode.
	Thanks to Andrew Schorr for finding the problem and supplying
	initial code; I did it slightly differently.

2015-04-03         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (force_string): If hard_regex, return string text of the regex.
	(force_string, force_number): If hard_regex, return Nnull_string.
	* awkgram.y: Fix ~ and !~ with @/.../.
	* eval.c (setup_frame): Handle a hard regex.
	* re.c (avoid_dfa): Ditto.

2015-04-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* NEWS: Rename div to intdiv.

2015-04-02         Arnold D. Robbins     <arnold@skeeve.com>

	Rename div() to intdiv().

	* builtin.c (do_intdiv): Renamed from do_div.
	* mfpr.c (do_mpfr_intdiv): Renamed from do_mpfr_div.
	* awk.h: Update declarations.
	* awkgram.y (tokentab, snode): Revise accordingly.

2015-03-31         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (call_sub): Renamed from call_sub_func.
	(call_match, call_split_func): Declare.
	* builtin.c (call_sub): Renamed from call_sub_func.
	(call_match, call_split_func): New functions.
	* interpret.h (r_interpret): Call new functions as appropriate.
	* node.c (r_unref): Revert change to handle Node_regex, not needed.

2015-03-31         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (r_get_field): Declare.
	* builtin.c (call_sub_func): Rearrange the stack to be what
	the buitin function expects.
	* eval.c (r_get_field): Make extern.

2015-03-27         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (redirect): Change not_string from int to bool.
	* gawkapi.c (api_get_file): Minor stylistic improvements.
	* NEWS: Updated for retryable I/O and new API function.

2015-03-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (make_regnode): Make extern.
	* awk.h (make_regnode): Declare.
	* builtin.c (call_sub_func): Start on reworking the stack to
	be what do_sub() expects. Still needs work.
	* interpret.h (r_interpret): Add a cast in comparison with do_sub().
	* node.c (r_unref): Handle Node_regex nodes.

2015-03-24         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* interpret.h (r_interpret): When Op_K_exit has an argument of
	Nnull_string, do not update exit_val, since no value was supplied.

2015-03-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h, gawkapi.c, io.c: Minor code reformatting.

2015-03-20         Arnold D. Robbins     <arnold@skeeve.com>

	Start on fixing indirect calls of builtins.

	* awk.h (call_sub_func): Add declaration.
	* awkgram.y (lookup_builtin): Handle length, sub functions.
	(install_builtin): Handle length function.
	* builtin.c (call_sub_func): New function.
	* interpret.h (r_interpret): If calling do_sub, do it through
	call_sub_func().

2015-03-19         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (re_update): Handle hard regex - for sub/gsub/gensub.
	* awkgram.y (grammar): Add support for hard_regex with ~ and !~;
	allowed only on the right hand side.
	(mk_rexp): Handle a hard regex.

2015-03-18         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_typeof): Be smarter about checking for uninitialized
	values; can now detect and return "untyped" for such values.
	* awkgram.y (yylex): Collect @/.../ entirely in the lexer and return
	a new terminal (HARD_REGEX).
	(regexp): Reverted to just a regular awk regexp constant.
	(hard_regexp): New nonterminal, can be used only in direct
	assignment and as an argument in function call. New set of nonterminals
	for function call expression lists.  More work still to do.

2015-03-18         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated, from libtool 2.4.6.

2015-03-17         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_number): Allocate enough room to print the number
	in all cases. Was a problem mixing -M with profiling with a really
	big number. Thanks to Hermann Peifer for the bug report.

2015-03-08         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (regexflags2str): Removed. It was redundant.

	* io.c (devopen): Change the logic such that if nonfatal is true
	for the socket, don't do retries.  Also clean up the formatting
	some.  At strictopen, check if errno is ENOENT and if so, propagate
	the error from getaddrinfo() up to the caller. Add explanatory
	comments.

2015-02-28         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (pty_vs_pipe): Remove check for NULL PROCINFO_node, since
	this is now checked inside in_PROCINFO.

2015-02-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (socketopen): New parameter hard_error; set it if
	getaddrinfo() fails. Change fatals to warnings.
	(devopen): Pass in address of boolean hard_error variable
	and stop trying to open the file if hard_error is true.
	Save and restore errno around call to socketopen() and
	use restored errno if open() fails at strictopen.

2015-02-27         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (check_param_names): Fix argument order in memset() call.
	* configure.ac: Use AC_SEARCH_LIBS instead of AC_CHECK_LIB. This fixes
	a long-standing problem where `-lm' was used twice in the final
	compilation line.

2015-02-27         Arnold D. Robbins     <arnold@skeeve.com>

	Start on making regexp a real type.

	* awk.h (Node_hardregex): New node type.
	(do_typeof): Add declaration.
	* awkgram.y: Make @/.../ a hard regex.
	(tokentab): New entry for typeof() function.
	(snode): Try to handle typeof().
	(make_regnode): Handle Node_hardregex.
	* builtin.c (do_typeof): New function.
	* eval.c (nodetypes): Add Node_hardregex.
	* re.c (re_update): Check for hardregex too in assert.

2015-02-24         Arnold D. Robbins     <arnold@skeeve.com>

	* POSIX.STD: Update copyright year.
	* awkgram.y (yylex): Allow \r after \\ line continuation everywhere.
	Thanks to Scott Rush <scott.rush@honeywell.com> for the report.

2015-02-13         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Be more careful about passing true to
	nextc() when collecting a regexp.  Some systems' iscntrl()
	are not as forgiving as GLIBC's. E.g., Solaris.
	Thanks to Dagobert Michelsen <dam@baltic-online.de> for
	the bug report and access to systems to check the fix.

2015-02-12         Arnold D. Robbins     <arnold@skeeve.com>

	* POSIX.STD: Update with info about function parameters.
	* configure.ac: Remove test for / use of dbug library.

2015-02-11         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Fix spelling error in comment.

2015-02-10         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Restore printing of count for rules.
	Bug report by Hermann Peifer.

2015-02-08         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c: Make it "NONFATAL" everywhere.

2015-02-08         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (RED_NON_FATAL): Removed.
	(redirect): Add new failure_fatal parameter.
	(is_non_fatal_redirect): Add declaration.
	* builtin.c (efwrite): Rework check for non-fatal.
	(do_printf): Adjust calls to redirect.
	(do_print_rec): Ditto. Move check for redirection error up.
	* io.c (redflags2str): Remove RED_NON_FATAL.
	(redirect): Add new failure_fatal parameter. Simplify the code.
	(is_non_fatal_redirect): New function.
	(do_getline_redir): Adjust calls to redirect.

2014-12-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (is_non_fatal_std): Declare new function.
	* io.c (is_non_fatal_std): New function.
	* builtin.c (efwrite): Call it.

2015-02-07         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex.c, regex.h, regex_internal.c, regex_internal.h,
	regexec.c: Sync with GLIBC. Mostly copyright date updates.

2015-02-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* eval.c (set_IGNORECASE): If IGNORECASE has a numeric value, try
	using that before treating it as a string.  This fixes a problem
	where setting -v IGNORECASE=0 on the command line was not working
	properly.

2015-02-01         Arnold D. Robbins     <arnold@skeeve.com>

	Move POSIX requirement for disallowing parameter names with the
	same name as a function into --posix.

	* NEWS: Document it.
	* awkgram.y (parse_program): Check do_posix before calling
	check_param_names().
	* symbol.c (check_param_names): Set up a fake node and call
	in_array() for function parameter names instead of linear
	searching the function list a second time. Thanks to Andrew
	Schorr for the motivation.

2015-01-30         Arnold D. Robbins     <arnold@skeeve.com>

	Don't allow function parameter names to be the same as function
	names - required by POSIX. Bug first reported in comp.lang.awk.

	In addition, don't allow use of a parameter as a function name
	in a call (but it's ok in indirect calls).

	* NEWS: Updated.
	* awk.h (check_param_names): Add declaration.
	* awkgram.y (at_seen): New variable. Communicates between
	yylex() and the parser.
	(FUNC_CALL production): Check at_seen and check that the identifier
	is a function name.
	(parse_program): Call check_param_names() and set errcount.
	(yylex): Set at_seen after seeing an at-sign.
	* symbol.c (check_param_names): New function.

2015-01-24         Arnold D. Robbins     <arnold@skeeve.com>

	Infrastructure updates.

	Bison 3.0.4. Automake 1.15. Gettext 0.19.4.

2015-01-20         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (api_set_array_element): Remove useless call to
	make_aname.
	* symbol.c (load_symbols): Ditto.
	Thanks to Andrew Schorr for pointing out the problem.

2015-01-19         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c: Update to bison 3.0.3.
	* command.c: Ditto.
	* NEWS: Note same.

2015-01-16         Stephen Davies        <sdavies@sdc.com.au>

	* awkgram.y (rule): Set first_rule to false. Catches more cases
	for gathering comments. Thanks to Hermann Peifer for the test case.

2015-01-15         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Sync with grep. Mainly copyright updates.
	* getopt.c, getopt.h, getopt1.c getopt_int.h: Sync with GLIBC.
	Mainly copyright updates, one minor code fix.

2015-01-14         Arnold D. Robbins     <arnold@skeeve.com>

	Remove deferred variables.

	* awk.h (register_deferred_variable): Remove declaration.
	* awkgram.y (is_deferred_variable, process_deferred,
	symtab_used, extensions_used, deferred_variables,
	process_deferred): Remove declarations, bodies, and uses.
	* builtin.c (do_length): Update comment.
	* main.c (init_vars): Just call load_procinfo() and `load_environ()'.

2015-01-08         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Revert changes to API deferred variable creation -- these variables
	should be created when lookup is called, not when update is called.
	* awk.h (variable_create): Remove function declaration.
	* awkgram.y (variable_create): Remove function.
	(variable): Restore variable_create functionality inline.
	* gawkapi.c (api_sym_update): Revert to using install_symbol, since the
	deferred variable check should be done when lookup is called, not here.

2015-01-07         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_set_array_element): Remove stray call to
	make_aname.  I cannot see what purpose this served.  Maybe I am
	missing something.

2015-01-07         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Update debug flags if developing.
	* awkgram.y (yylex): Regex parsing bug fix for bracket expressions.
	Thanks to Mike Brennan for the report.
	* builtin.c (format_tree): Catch non-use of count$ for dynamic
	field width or precision.

	Unrelated:

	Load deferred variables if extensions are used; they might
	want to access PROCINFO and/or ENVIRON. Thanks to Andrew Schorr
	for pointing out the issue.

	* awkgram.y (extensions_used): New variable. Set it on @load.
	(do_add_scrfile): Set it on -l.
	(process_deferred): Check it also.

2015-01-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_sym_update): If copying a subarray, must update
	the parent_array pointer.  Also, call the astore hook if non-NULL.
	(api_set_array_element): Call the astore hook if non-NULL.

2015-01-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (variable_create): Now takes a 3rd argument to tell caller
	whether this is a deferred variable.
	* awkgram.y (variable_create): Return indicator of whether this is
	a deferred variable in a newly added 3rd arg.
	(variable): Pass 3rd arg to variable_create.
	* gawkapi.c (api_sym_update): If we triggered the creation of a deferred
	variable, we must merge the extension's array elements into the deferred
	array, not the other way around.  The ENVIRON array has special funcs
	to call setenv and unsetenv.

2015-01-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (variable_create): Declare new function.
	* awkgram.y (variable_create): New function to create a variable
	taking the deferred variable list into consideration.
	(variable): Call new function variable_create if the variable is
	not found.
	* gawkapi.c (api_sym_update): If an array is being created, then
	call new function variable_create instead of install_symbol.  If this
	is the first reference to a deferred variable, than the new array
	may contain elements that must be merged into the array provided by
	the extension.

2015-01-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (wait_any): If the `interesting' argument is non-zero, then we
	must not return until that child process has exited, since the caller
	gawk_pclose depends on our returning its exit status.  So in that case,
	do not pass WNOHANG to waitpid.

2015-01-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h: Fix another comment typo.

2015-01-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h: Fix typo in comment.

2015-01-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (gawk_api): Modify api_get_file to remove the typelen
	argument.
	(get_file): Remove typelen argument from the macro.
	* gawkapi.c (api_get_file): Remove typelen argument.

2014-12-24         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Be sure to set ip2 in all paths
	through the code. Thanks to GCC 4.9 for the warning.

2014-12-18         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Do not waste a byte at the end of a string.

2014-12-14         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yyerror): Do not waste a byte at the end of a string.
	* builtin.c (do_match): Ditto.
	* command.y (append_statement): Ditto.
	* debug.c (gprintf, serialize): Ditto.
	* field.c (set_FIELDWIDTHS): Ditto.
	* io.c.c (grow_iop_buffer): Ditto.
	* profile.c (pp_string, pp_group3): Ditto.

2014-12-14         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* array.c (concat_exp): Do not waste a byte at the end of a string.
	* awkgram.y (common_exp): Ditto.
	* builtin.c (do_substr): Ditto.
	* eval.c (set_OFS): Ditto.
	* field.c (rebuild_record): Ditto.
	* gawkapi.h (r_make_string): Ditto.
	* interpret.h (r_interpret): Ditto for Op_assign_concat.
	* node.c (r_format_val, r_dupnode, make_str_node, str2wstr, wstr2str):
	Ditto.
	* re.c (make_regexp): Ditto.

2014-12-20         Arnold D. Robbins     <arnold@skeeve.com>

	Enable non-fatal output on per-file or global basis,
	via PROCINFO.

	* awk.h (RED_NON_FATAL): New redirection flag.
	* builtin.c (efwrite): If RED_NON_FATAL set, just set ERRNO and return.
	(do_printf): Check errflg and if set, set ERRNO and return.
	(do_print): Ditto.
	(do_print_rec): Ditto.
	* io.c (redflags2str): Update table.
	(redirect): Check for global PROCINFO["nonfatal"] or for
	PROCINFO[file, "nonfatal"] and don't fail on open if set.
	Add RED_NON_FATAL to flags.
	(in_PROCINFO): Make smarter and more general.

2014-12-12        Stephen Davies         <sdavies@sdc.com.au>

	Improve comment handling in pretty printing.

	* awk.h (comment_type): New field in the node.
	(EOL_COMMENT, FULL_COMMENT): New defines.
	* awkgram.y (block_comment): New variable.
	(check_comment): New function.
	(grammar): Add code to handle comments as needed.
	(get_comment): Now takes a flag indicating kind of comment.
	(yylex): Collect comments appropriately.
	(append_rule): Ditto.
	* profile.c (pprint): Smarten up comment handling.
	Have printing \n take comments into account.
	(end_line): New function.
	(pp_func): Better handling of function comments.

2014-12-10         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-11-26         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Improve wording of gensub warnings.

2014-11-25         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): For gensub, add more warnings for invalid
	third argument.

2014-11-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Move all inline functions to the bottom of the file.
	Keeps modern GCC happier.

2014-11-22         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (emalloc, realloc): Redefine in terms of ...
	(emalloc_real, erealloc_real): New static inline functions.
	(fatal): Move definition up.
	* gawkmisc.c (xmalloc): If count is zero, make it one for older
	mallocs that require size > 0 (such as z/OS).

2014-11-21         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c: Remove a debugging // comment.
	* NOTES: Removed.

	Unrelated:

	Revert changes of 2014-11-20 from Paul Eggert. Causes failures
	on z/OS.

	Unrelated: Avoid unnecessary copying of $0.

	* interpret.h (UNFIELD): New macro.
	(r_interpret): Use it where *lhs is assigned to.

2014-11-20  Paul Eggert  <eggert@cs.ucla.edu>

	Port to systems where malloc (0) and/or realloc(P, 0) returns NULL.
	* gawkmisc.c (xmalloc):
	* xalloc.h (realloc):
	Do not fail if malloc(0) or realloc(P, 0) returns NULL.
	Fail only when the allocator returns null when attempting to
	allocate a nonzero number of bytes.

2014-11-19         Arnold D. Robbins     <arnold@skeeve.com>

	Infrastructure upgrades:

	* Automake 1.14.1, Gettext 0.19.3, Libtool 2.4.3.
	* compile, extension/build-aux/compile: New files.

2014-11-19  gettextize  <bug-gnu-gettext@gnu.org>

	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump to 0.19.3.

2014-11-16         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h: Revert change of 2014-11-11 since it breaks
	certain uses.

	Unrelated:

	* dfa.c: Sync with GNU grep.

2014-11-15         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c, awk.h, awkgram.y, builtin.c, dfa.c, eval.c, field.c,
	interpret.h, io.c, main.c, mpfr.c, node.c, re.c, regex_internal.h,
	replace.c: Remove all uses of MBS_SUPPORT.
	* regex_internal.h: Disable wide characters on DJGPP.
	* mbsupport.h: Rework to be needed only for DJGPP.

2014-11-11         Arnold D. Robbins     <arnold@skeeve.com>

	Don't let memory used increase linearly in the size of
	the input.  Problem reported by dragan legic
	<dragan.legic@yandex.ru>.

	* field.c (set_record): NUL-terminate the buffer.
	* interpret.h (r_interpret): Op_field_spec: if it's $0, increment
	the valref.  Op_store_var: if we got $0, handle it appropriately.

2014-11-10         Arnold D. Robbins     <arnold@skeeve.com>

	Reorder main.c activities so that we can set a locale on the
	command line with the new, for now undocumented, -Z option.

	* main.c (parse_args, set_locale_stuff): New functions.
	(stopped_early): Made file level static.
	(optlist, optab): Add new argument.
	(main): Adjust ordering and move inline code into new functions.

2014-11-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (node_to_awk_value): When the type wanted is AWK_UNDEFINED
	and a it's a Node_val set to Nnull_string, return AWK_UNDEFINED instead
	of AWK_NUMBER 0.

2014-11-06         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (redirect_string): First argument should be const.  Add a new
	extfd argument to enable extensions to create files with pre-opened
	file descriptors.
	(after_beginfile): Declare function used in both eval.c and gawkapi.c.
	* eval.c (after_beginfile): Remove extern declaration now in awk.h.
	* gawkapi.c (api_get_file): Implement API changes to return
	awk_input_buf_t and/or awk_output_buf_t info, as well as accept an
	fd for inserting an opened file into the table.
	* gawkapi.h (gawk_api): Modify the api_get_file declaration to
	return awk_bool_t and add 3 new arguments -- a file descriptor
	for inserting an already opened file, and awk_input_buf_t and
	awk_output_buf_t to return info about both input and output.
	(get_file): Add new arguments to the macro.
	* io.c (redirect_string): First arg should be const, and add a new
	extfd arg so extensions can pass in a file that has already been
	opened by the extension.  Use the passed-in fd when appropriate,
	and pass it into two_way_open.
	(redirect): Pass new fd -1 arg to redirect_string.
	(two_way_open): Accept new extension fd parameter and open it
	as a socket.

2014-11-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (retryable): New function to indicate whether I/O can be
	retried for this file instead of throwing a hard error.
	(get_a_record) Check whether this file is configured for retryable
	I/O before returning nonstandard -2.

2014-11-03         Norihiro Tanaka       <noritnk@kcn.ne.jp>

	* re.c (research): Use dfa superset to improve matching speed.

2014-11-02         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (div_on_left_mul_on_right): New function.
	(parenthesize): Call it.

2014-10-30         Arnold D. Robbins     <arnold@skeeve.com>

	* configure: Regenerated after fix to m4/readline.m4.

	Unrelated; fixes to profiling. Thanks to Hermann Peifer and
	Manuel Collado for pointing out problems:

	* profile.c (pprint): For Op_unary_minus, parenthesize -(-x)
	correctly.
	(prec_level): Get the levels right (checked the grammar).
	(is_unary_minus): New function.
	(pp_concat): Add checks for unary minus; needs to be parenthesized.

2014-10-30         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* NEWS: Mention installation of /etc/profile.d/gawk.{csh,sh}.

2014-10-29         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac (AC_CONFIG_FILES): Add extras/Makefile.
	* Makefile.am (SUBDIRS): Add extras.
	* extras: Add new subdirectory.

2014-10-29         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep. Again, again.

2014-10-28         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep. Again.

2014-10-25         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-10-17         John E. Malmberg      <wb8tyw@qsl.net>

	* ext.c (close_extensions): Test for null pointer since
	since this can be called by signal handler before the
	pointers are initialized.

2014-10-15         Arnold D. Robbins     <arnold@skeeve.com>

	Make sane the handling of AWKPATH and AWKLIBPATH:

	1. Don't explicitly search "."; it must be in the path either
	physically or as null element a la the shell's $PATH
	2. If environment's value was empty, use built-in default value.
	3. Set ENVIRON["AWK*PATH"] to the path used.

	* io.c (path_info): Remove try_cwd member.
	(get_cwd): Removed, not needed anymore.
	(do_find_source): Don't do explicit check in current directory.
	It must come from the AWKPATH or AWKLIBPATH variable.
	* main.c (path_environ): If value from environment was empty,
	set it to the default.  This is how gawk has behaved since 2.10.

2014-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c (__re_error_msgid): Make error message for REG_EBRACK
	more helpful - also used for unmatched [:, [., [=.
	Thanks to Davide Brini for raising the issue.

2014-10-12         KO Myung-Hun          <komh78@gmail.com>

	Fixes for OS/2:

	* Makefile.am (install-exec-hook, uninstall-links): Use $(EXEEXT).
	* getopt.h: Redefinitions if using KLIBC.
	* io.c (_S_IFDIR, _S_IRWXU): Define if the more standard versions
	are available.

2014-10-12         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Remove Pat Rankin from VMS duties, per his request.

2014-10-08         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-10-05         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Fix typo in header. Sheesh.

	Unrelated:

	* awkgram.y (mk_program): Add a comment that we don't need to
	clear the comment* variables.

2014-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_string_fp): Fix breaklines case to actually
	output the current letter. This broke at gawk 4.0.0. Sigh.
	Thanks to Bert Bos (bert@w3.org) for the report.

2014-10-03	Stephen Davies		<sdavies@sdc.com.au>

	* awkgram.y (program_comment): Renamed from comment0.
	(function_comment): Renamed from commentf.

2014-10-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y, profile.c: Minor white space cleanups.

2014-10-01         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a few compile warnings:

	* awkgram.y (split_comment): Make static.
	General: Remove some unused variables, clean up some whitepace nits.

	* profile.c (indent): Add some braces to turn off compiler warnings.

2014-09-29         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* main.c (main): In optlist, it should say "h", not "h:", since there
	is no argument for the help option.  Thanks to Joep van Delft for
	the bug report.

2014-09-29         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Minor edits to sync with documentation. Does not
	influence the behavior of the API.

2014-09-28         Arnold D. Robbins     <arnold@skeeve.com>

	* command.y (cmdtab): Add "where" as an alias for "backtrace".
	Finally!

	Unrelated:

	* dfa.c: Sync with GNU grep.

2014-09-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (check_for_bad): Bitwise-and the bad character with 0xFF
	to avoid sign extension into a large integer.

	Unrelated:

	* configure.ac: Add an option to enable locale letters in identifiers.
	Undocumented and subject to being rescinded at any time in the future.
	* awkgram.y (is_alpha): Actual code is here.
	* NEWS: Mention to look at configure --help.

	Unrelated:

	* profile.c (pprint): Use "rule(s)" instead of "block(s)" in the
	header.

2014-09-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (yylex): Don't check for junk characters inside
	quoted strings.  Caused issues on DJGPP and Solaris.

	Unrelated:

	* io.c (devopen): Straighten things out with respect to
	compatibility with BWK awk.

2014-09-19         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Further commentary as to the treacherousness
	of isalnum and isalpha.

2014-09-15         Arnold D. Robbins     <arnold@skeeve.com>

	Finish removing use of isalpha and isalnum.

	* awk.h (is_alpha, is_alnum, is_identchar): Add declarations.
	* awkgram.y (yylex): Use is_alpha.
	(is_alpha, is_alnum): New functions.
	(is_identchar): Use is_alnum.
	* builtin.c (r_format_tree): Use is_alpha, is_alnum.
	* command.y (yylex): Use is_alpha, is_identchar.
	* ext.c (is_letter): Use is_alpha.
	(is_identifier_char): Removed; replaced uses with is_identchar.
	* main.c (arg_assign): Use is_alpha, is_alnum.
	* node.c (r_force_number): Use is_alpha.

2014-09-14         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (is_identchar): Change from simple macro to function
	since use of isalnum() let non-ASCII letters slip through into
	identifiers.

2014-09-13	Stephen Davies		<sdavies@sdc.com.au>

	When doing pretty-printing (but not profiling), include the original
	comments in the output.

	General rules:

	Pretty printing:
		- Do NOT indent by a tab
		- Do NOT print the header comments ("# BEGIN rules", etc.)
		- DO print the comments that are in the program

	Profiling:
		- DO indent by a tab
		- DO print the header comments
		- Do NOT print the program's original comments

	* awkgram.y (comment0, commentf): New variables that are  pointers to
	program and function comments.
	(get_comment): New function that retrieves consecutive comment lines
	and empty lines as a unit).
	(split_comment): New function: iff first block in the program is a
	function and it is preceded by comments, take the last non-blank
	line as function comment and any preceding lines as program comment.)

	Following token rules were changed to handle comments:

	* awkgram.y (pattern, LEX_BEGIN, LEX_END, LEX_BEGINFILE, LEX_ENDFILE,
	action, function_prologue, statements): Update to handle comments.
				
	Following functions were changed to handle comments:

	* awkgram.y (mk_program, mk_function, allow_newline and yylex): Update
	to handle comments. (Also fixed typo in case '\\'.)

	* profile.c (print_comment): New function to format comment printing.
	(indent, pprint, dump_prog, pp_func): Changed to handle comments and
	the revised indentation rules.

2014-09-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Move libsigsegv stuff to ...
	* main.c: here. Thanks to Yehezkel Bernat for motivating
	the cleanup.
	* symbol.c (make_symbol, install, install_symbol): Add const to
	first parameter. Adjust decls and fix up uses.

2014-09-05         Arnold D. Robbins     <arnold@skeeve.com>

	Add builtin functions to FUNCTAB for consistency.

	* awk.h (Node_builtin_func): New node type.
	(install_builtins): Declare new function.
	* awkgram.y [DEBUG_USE]: New flag value for debug functions; they
	don't go into FUNCTAB.
	(install_builtins): New function.
	* eval.c (nodetypes): Add Node_builtin_func.
	* interpret.h (r_interpret): Rework indirect calls of built-ins
	since they're now in the symbol table.
	* main.c (main): Call `install_builtins'.
	* symbol.c (install): Adjust for Node_builtin_func.
	(load_symbols): Ditto.

2014-09-04         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pprint): Case Op_K_for: Improve printing of
	empty for loop header.

	Unrelated: Make indirect function calls work for built-in and
	extension functions.

	* awkgram.y (lookup_builtin): New function.
	* awk.h (builtin_func_t): New typedef.
	(lookup_builtin): Declare it.
	* interpret.h (r_interpret): For indirect calls, add code to
	find and call builtin functions, and call extension functions.

2014-09-01         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_substr): Return "" instead of null string in case
	result is passed to length() with --lint. Based on discussions in
	comp.lang.awk.

	Unrelated:

	* interpret.h (r_interpret): For indirect function call, separate
	error message if lookup returned NULL. Otherwise got a core dump.
	Thanks to "Kenny McKormack" for the report in comp.lang.awk.

2014-08-27         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add test for strcasecmp.
	* regcomp.c: Remove special case code around use of strcasecmp().
	* replace.c: Include missing/strncasecmp.c if either strcasecmp()
	or strncasecmp() aren't available.

2014-08-26         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex_internal.c: Sync with GBLIC. Why not.

	Unrelated:

	Remove support for MirBSD. It uglified the code too much
	for no discernible gain.

	* configure.ac: Remove check for MirBSD and define of
	LIBC_IS_BORKED.
	* dfa.c: Remove code depending on LIBC_IS_BORKED.
	* main.c: Ditto.
	* regcomp.c: Ditto.
	* NEWS: Updated.

2014-08-24         Arnold D. Robbins     <arnold@skeeve.com>

	* regex.h: Remove underscores in names of parameters in function
	declarations. Tweak names as needed.

2014-08-20         Arnold D. Robbins     <arnold@skeeve.com>

	* node.c (parse_escape): Max of 2 digits after \x.

2014-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c: General formatting cleanup.

2014-08-15         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Adjust whitespace for -L and add "invalid"
	as a possible value for it.  Report from Robert P. J. Day
	<rpjday@crashcourse.ca>.

2014-08-14         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (SUBDIRS): Put awklib after doc so that examples
	get extracted when the doc changes.

2014-08-13         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Move initial allocation of the replacement
	string down towards code to do the replacement, with a (we hope)
	better guesstimate of how much to initially allocate. The idea
	is to avoid unnecessary realloc() calls by making a better guess
	at how much to allocate.  This came up in an email discussion
	with Tom Dickey about mawk's gsub().

2014-08-12         Juergen Kahrs <jkahrs@users.sourceforge.net>

	* cmake/configure.cmake:
	* cmake/package.cmake: Copyright update.
	* README.cmake:
	* README_d/README.cmake: Moved file.

2014-08-12         Arnold D. Robbins     <arnold@skeeve.com>

	OFS being set should rebuild $0 using previous OFS if $0
	needs to be rebuilt. Thanks to Mike Brennan for pointing this out.

	* awk.h (rebuild_record): Declare.
	* eval.c (set_OFS): If not being called from var_init(), check
	if $0 needs rebuilding. If so, parse the record fully and rebuild it.
	Make OFS point to a separate copy of the new OFS for next time, since
	OFS_node->var_value->stptr was already updated at this point.
	* field.c (rebuild_record): Is now extern instead of static.
	Use OFS and OFSlen instead of the value of OFS_node.

	Unrelated:

	* Makefile.am (RM): Define for makes that don't have it,
	such as on OpenBSD.  Thanks to Jeremie Courreges-Anglas
	<jca@wxcvbn.org> for the report.

2014-08-05         Arnold D. Robbins     <arnold@skeeve.com>

	Bug fix: For MPFR sqrt(), need to set precision of result to be
	the same as that of the argument. Doesn't hurt other functions.
	See test/mpfrsqrt.awk. Thank to Katie Wasserman <katie@wass.net>
	for the bug report.

	* mpfr.c (do_mpfr_func): New function. Runs code for MPFR functions
	while still enabling debugging. Add call here to mpfr_set_prec().
	Original code from SPEC_MATH macro.
	(SPEC_MATH): Change macro to call do_mpfr_func().

	Next MPFR bug fix: The % operator gave strange results for negative
	numerator. Thanks again to Katie Wasserman for the bug report.

	* mpfr.c (mpg_mod): Use mpz_tdiv_qr() instead of mpz_mod(). From
	the GMP doc, mpz_mod() should have worked; it's not clear why
	it doesn't.

2014-08-03         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_tree): Don't need to check return value of
	wctombr for -2. Thanks to Eli Zaretskii for pointing this out.

	Unrelated:

	* gawkapi.h: Fix doc for API get_record - errcode needs to
	be greater than zero.
	* interpret.h (r_interpret): Move setting of ERRNO to here, from ...
	* io.c (inrec): ... here. Makes the code cleaner.

2014-08-03         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (getfname): Match on either ptr or ptr2 so --profile
	will work in -M (MPFR bignum) mode.

2014-07-31         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_tree): Make %c handling more sane on Windows.
	Rework the lint messages.

	Unrelated:

	* dfa.c: Sync with GNU grep. Mainly white space differences.

	Unrelated:

	* mpfr.c (cleanup_mpfr): New function to deallocate _mpf_t1
	and _mpf_t2; removes some valgrind warnings.
	* awk.h (cleanup_mpfr): Add declaration.
	* main.c (main): Add call to `cleanup_mpfr'.

	Fix memory leak:

	* mpfr.c (do_mpfr_div): Add unref to denominator and numerator
	to not leak memory. Thanks to Katie Wasserman <katie@wass.net>
	for isolating the problem to that routine.

2014-07-25         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Add a warning message if -M is used and gawk was
	compiled without MPFR/GMP.

2014-07-24         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (usage): Put text for `-n' *after* text for `-m'.
	Report from Robert P. J. Day <rpjday@crashcourse.ca>.

	Fix problems with I/O errors reported by Assaf Gordon
	<assafgordon@gmail.com>:

	* io.c (inrec): Change type to bool to make calling easier. Add
	check in non-EOF case for error, and if so, return false.
	Update ERRNO in case there is an ENDFILE block.
	* awk.h (inrec): Change type in declaration.
	* interpret.h (r_interpret): Change call of inrec() to boolean
	notation.

2014-07-10         Arnold D. Robbins     <arnold@skeeve.com>

	New `div()' function to do integer division and remainder;
	mainly useful for use with GMP integers. Thanks to
	Katie Wasserman <katie@wass.net> for the suggestion.

	* awk.h (do_div, do_mpfr_div): Declare new functions.
	* builtin.c (do_div): New function.
	* mpfr.c (do_mpfr_div): New function.
	* awkgram.y (tokentab): New entry.
	(snode): Add check for do_div/do_mpfr_div to make 3rd arg
	be an array.
	* NEWS: Updated.
	* TODO: Updated.

2014-07-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (check_for_bad): New routine to do the fatal message,
	with smarter checking.
	(nextc): Call it as appropriate.

	* builtin.c (format_tree): Add check for bad returns from mbrlen
	to avoid trying to malloc (size_t) -1 bytes. Thanks to
	mail.green.fox@gmail.com for the bug report.

2014-07-03         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (nextc): Add bool check_for_bad parameter to check
	for bad characters in the source program.
	(yylex): Adjust calls.

2014-06-24         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): The --pretty-print option no longer runs the
	program.  This removes the need for the GAWK_NO_PP_RUN environment var.
	* NEWS: Updated.
	* TODO: Updated.

2014-06-22         Paul Eggert          <eggert@penguin.cs.ucla.edu>

	Bring in from GNULIB:

	regex: fix memory leak in compiler
	Fix by Andreas Schwab in:
	https://sourceware.org/ml/libc-alpha/2014-06/msg00462.html
	* lib/regcomp.c (parse_expression): Deallocate partially
	constructed tree before returning error.

2014-06-19         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Add more info to leading comment.
	Add some whitespace in the code.

2014-06-08         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-06-03         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (mbs_to_wchar): Define a macro if not MBS.

2014-05-29         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-05-26         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (inetfile): Change return type to bool.  Wrap code
	with ifdef HAVE_SOCKETS so that it'll compile on DJGPP.

2014-05-22         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Allow any redirected getline inside BEGINFILE/ENDFILE.

	* awkgram.y (LEX_GETLINE): Only require a redirection and not also
	a variable if getline is in a BEGINFILE or ENDFILE rule.
	* interpret.h (Op_K_getline_redir): Remove check and fatal error.

2014-05-20         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (dfaexec): Minor sync with GNU grep.

2014-05-14         Arnold D. Robbins     <arnold@skeeve.com>

	* custom.h (_GL_PURE): Move definition to here. Sigh.
	* dfa.h, dfa.c: Sync with GNU grep. Sigh.

	Unrelated:

	* custom.h: Remove stuff for Ultrix 4.3. No one has such
	systems anymore; this just got missed earlier.

2014-05-11         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (do_eval): Repair fix of 2014-05-09 and use
	assoc_remove to take @eval out of the function table.
	* symbol.c: Fix a comment.  This file needs some work.

2014-05-10         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (get_a_record): Finish TERMNEAREND handling in case
	we don't have a regular file but aren't going to get more data.
	Added some additional comments.

2014-05-09         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (do_eval): Don't free `f' which points into the context
	that was previously freed. Bug reported by Jan Chaloupka
	<jchaloup@redhat.com>.  Apparently introduced with move to
	SYMTAB and FUNCTAB, but only showed up on Fedora 20 and Ubuntu 14.04,
	which have a newer glibc.
	(do_eval): Fix a memory leak seen by valgrind on Fedora 20 and
	Ubuntu 14.04: the new SRCFILE that is added wasn't released.

	Unrelated:

	* io.c (get_a_record): Handle return of TERMNEAREND when the
	entire file has been read into the buffer and we're using a
	regex for RS. Bug report by Grail Dane <grail69@hotmail.com>.

2014-05-04         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (debug_prog): Change check for GAWK_RESTART so that it
	actually works. Bug fix: run command in debugger would start
	over again but not actually start running the program.

2014-04-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (two_way_open): In forked child, reset SIGPIPE to SIG_DFL.
	Fixes problems with "broken pipe" errors from child processes,
	restoring 4.1.0 and earlier behavior. Thanks to Daryl F
	<wyatt@prairieturtle.ca> for the report.
	(gawk_popen): Ditto.

2014-04-25         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Merge with GNU grep; lots of forward motion.

2014-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	Update xalloc.h for pending merge with dfa.

	* xalloc.h (xstrdup): Implement this.
	(x2nrealloc): Incorporate changed logic from GNULIB.

2014-04-20         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (struct inet_socket_info): Define new structure
	for use in parsing special socket filenames.
	(inetfile): Parse all components of the special socket filename
	into the struct inet_socket_info.  Returns true only if it is a
	valid socket fliename, unlike the previous version which checked
	for the '/inet[46]?/' prefix only.
	(redirect): Patch to use updated inetfile() function.
	(devopen): Remove logic to parse socket filenames, since this has
	been moved into the inetfile() function.
	(two_way_open): Update args to inetfile().

2014-04-20         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_rand): Make calls to random() in predictable
	order to avoid order of evaluation differences amongst compilers.
	Thanks to Anders Magnusson <ragge@ludd.ltu.se> (of the PCC team)
	for the suggestion.

2014-04-18         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Change adding of -export-dynamic for GCC to be
	-Wl,-export-dynamic, which then works for PCC also.

2014-04-11         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (closemaybesocket): Define if not defined, e.g. building
	without socket code. Thanks to dave.gma@googlemail.com (Dave Sines)
	for the report.

2014-04-08         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.1.1: Release tar ball made.

2014-04-08         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Update.
	* configure.ac: Bump version.

2014-04-03         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c (parse_bracket_exp): Move a call to `re_free' inside
	an ifdef. Makes the code marginally cleaner.

2014-03-30         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2014-03-28         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove duplicate AC_HEADER_TIME and rearrange
	order of macros some. May help on older systems.

2014-03-23         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Move include of dfa.h around for correct building
	on Irix. Thanks to Nelson H.F. Beebe for the report.

	Unrelated:

	* .gitignore: Simplify .dSYM pattern for Mac OS X.

2014-03-21         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (using_simple_locale): Add ifdefs in case there is no
	locale support at all. Thanks to Scott Deifik for the report.

	Unrelated:

	* main.c (UPDATE_YEAR): Set to 2014.

2014-03-17         Arnold D. Robbins     <arnold@skeeve.com>

	* .gitignore: Add .dSYM directories for Mac OS X.
	Thanks to Hermann Peifer for the suggestion.

2014-03-10         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Sync with grep. Yet again.
	* regex_internal.c (built_wcs_upper_buffer, build_upper_buffer):
	Fixes from GNULIB for mixed case matching on Mac OS X.

	Unrelated:

	* builtin.c (format_tree): Smarten handling of %' flag. Always
	pass it in for floating point formats. Then only add the
	thousands_sep if there is one. Also, allow for thousands_sep
	to be a string, not just one character.  Thanks to Michal Jaegermann
	for the report.

2014-03-08         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_impl): Add memory allocation function pointers.
	* gawkapi.h (GAWK_API_MINOR_VERSION): Bump.
	(gawk_api_t): Add memory allocation function pointers api_malloc,
	api_calloc, api_realloc, and api_free.
	(gawk_malloc, gawk_calloc, gawk_realloc, gawk_free): New macros.
	(emalloc): Replace malloc with gawk_malloc.
	(erealloc): Replace erealloc with gawk_erealloc.

2014-03-05         Arnold D. Robbins     <arnold@skeeve.com>

	Straighten out enumerated types some more.

	* awk.h (add_srcfile): Fix type of first parameter.
	* awkgram.y (add_srcfile, do_add_srcfile): Ditto.
	* cmd.h (A_NONE): New enum nametypeval.
	* command.y (argtab): Use it in final value.
	* ext.c (make_builtin): Use awk_false, awk_true.
	* io.c (init_output_wrapper): Use awk_false.

	Unrelated:

	* debug.c (do_commands): Initialize num to silence warnings.
	Thanks to Michal Jaegermann.

	Unrelated:

	* builtin.c (do_mktime): Change lint warning for minutes to
	check against 59, not 60.  Thanks to Hermann Peifer for the report.

2014-03-03         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep. Yet again.

2014-02-28         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with grep. Looks like good improvement with
	respect to bracket expressions.

2014-02-27         Arnold D. Robbins     <arnold@skeeve.com>

	Fixes for enum/int mismatches as warned by some compilers.

	* awk.h (ANONE): New enum for array sorting.
	* array.c (assoc_list): Use it.
	* builtin.c (format_tree): New MP_NONE value.
	* gawkapi.c: Use awk_false and awk_true everywhere instead of
	false and true.

2014-02-26         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Set up do-nothing extension/Makefile on
	MirBSD also.

2014-02-21         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c (parse_bracket_exp): Sync with grep.

2014-02-20         Arnold D. Robbins     <arnold@skeeve.com>

	* regex.h, regex.c, regex_internal.c, regex_internal.h: Sync
	with GLIBC. Mainly copyright updates.
	* getopt.c, getopt.h, getopt1.c, getopt_int.h: Ditto.
	* dfa.c (parse_bracket_exp): Sync with grep, where they restored
	the buggy code.  Sigh.

	Unrelated:

	* NEWS: Typo fix.
	* interpret.h (r_interpret): Init a variable for BEGINFILE to avoid
	compiler warnings. Thanks to Michal Jaegermann.

2014-02-15         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Regenerated - Bison 3.0.2.

2014-02-04         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (to_uchar): Make use of this. Syncs with GNU grep.

2014-02-03         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (negate_num): Bracket `tval' in #ifdef MPFR since it's
	only used in that code.

2014-01-31         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (dist-hook): Improve creation of pc/config.h. We
	have to jump through a lot of hoops for 'make distcheck' to
	actually work.

2014-01-30         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (dist-hook): Improve creation of pc/config.h to copy
	the new file into the distribution directory being created.
	Also, put the temporary files into /tmp.

2014-01-28         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (negate_num): If just a double, return. Fixes a bug
	that showed up on 32-bit systems with MPFR. Thanks to Eli Zaretskii
	and Corinna Vinschen for the report.  Also, free the MPZ integer.
	Thanks to valgrind for the report.

	Unrelated:

	* dfa.c: Sync with GNU grep - removed some special cased code
	for grep.

2014-01-24         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac, field.c: Update copyright year.

2014-01-19         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (negate_num): Handle the case of -0 for MPFR; the sign
	was getting lost. Thanks to Hermann Peifer for the report.

2014-01-18         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (parse_bracket_exp): Sync with GNU grep, which now uses
	gawk's code for RRI in single-byte locales!  Hurray.

2014-01-16         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: For z/OS, restore creation of do-nothing
	Makefile in extension directory.

2014-01-14         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (do_split): Make sure split() gets FS value if no
	third arg even after FPAT was set. Thanks to Janis Papanagnou
	for the report.

2014-01-13         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Fix John Malmberg's email address.

2014-01-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y:  Update copyright year.
	(func_use): Simplify code.
	* command.y:  Update copyright year.
	* ext.c:  Update copyright year.
	(make_builtin): Small simplification.
	(make_old_builtin): Make code consistent with make_builtin(), add
	call to track_ext_func().
	* bootstrap.sh: Update copyright year. Remove touch of version.c
	since that file is no longer autogenerated.

2014-01-07         Arnold D. Robbins     <arnold@skeeve.com>

	* command.y (next_word): Move into ifdef for HAVE_LIBREADLINE,
	since it's only used by that code.
	* ext.c (load_old_ext): Minor improvements.

2014-01-03         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.rpath, config.sub, depcomp,
	install-sh: Updated.
	* dfa.h, dfa.c: Sync with GNU grep; comment fix and copyright year.
	* NEWS: Updated some, including copyright year.

2013-12-26         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Add John Malmberg for VMS.

2013-12-24         Arnold D. Robbins     <arnold@skeeve.com>

	* getopt.h: Add `defined(__sun)' to list of system that do get to
	include stdlib.h.  Needed for Illumos. Thanks to
	Richard Palo <richard.palo@free.fr> for the report.

2013-12-21         Mike Frysinger        <vapier@gentoo.org>

	* configure.ac: Add --disable-extensions flag to control
	compiling extensions.  Better for cross-compiling.
	(AC_CANONICAL_HOST): Added. Changed case statements appropriately.
	* Makefile.am (check-for-shared-lib-support): Removed.
	(check-recursive, all-recursive): Removed.

2013-12-21         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated.
	* configure, aclocal.m4: Updated based on automake 1.13.4.

2013-12-19         Arnold D. Robbins     <arnold@skeeve.com>

	* regexec.c (re_search_internal): Make sure `dfa' pointer is
	not NULL before trying to dereference it.

2013-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (AC_FUNC_VPRINTF): Remove. Not needed on current
	systems.
	* awk.h (HAVE_VPRINTF): Remove check.

2013-12-12         John E. Malmberg      <wb8tyw@qsl.net>

	* io.c (redirect): Add additional VMS error codes.
	(nextfile): Retry open after closing some files.

2013-12-10         Scott Deifik          <scottd.mail@sbcglobal.net>

	* io.c (closemaybesocket): Add definition for DJGPP.

2013-12-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (Floor, Ceil): Remove declarations and VMS redefinitions.
	* floatcomp.c (Floor, Ceil): Removed, not needed. Move bracketing
	ifdef to the top of the file.
	* builtin.c (double_to_int): Use floor() and ceil().

2013-12-07         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.h (__attribute__): Define to empty if not GCC.
	* custom.h (__attribute__): Remove the definition from here; the
	right place was regex_internal.h.

2013-12-06         Arnold D. Robbins     <arnold@skeeve.com>

	No need to generate version.c from version.in.
	Thanks to John E. Malmberg <wb8tyw@qsl.net> for the suggestion.

	* version.in: Removed.
	* version.c: Use PACKAGE_STRING directly.
	* Makefile.am (EXTRA_DIST): Remove version.in.
	(distcleancheck_listfiles): Remove this rule.
	(MAINTAINERCLEANFILES): Remove this definition.
	(version.c): Remove the rule to create it.

2013-12-05         Arnold D. Robbins     <arnold@skeeve.com>

	Fixes for Z/OS.

	* custom.h (__attribute__): Define to empty.
	* dfa.c (parse_bracket_exp): Add a cast to quiet a warning.
	* regex.c: Correctly bracket include of <sys/param.h>.

	Unrelated:

	* debug.c (find_rule): Add a FIXME comment.

2013-12-03         John E. Malmberg	<wb8tyw@qsl.net>

	* io.c (redirect): Add additional VMS error code to check.
	(do_find_source): Append "/" if not a VMS filename.

2013-12-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* main.c (optab): Sort by long option name.

2013-11-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* main.c (optab): Add entry for --include.

2013-11-23         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Merge from grep; minor fixes in how bit twiddling
	is done.

2013-11-01         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (lex): Reset laststart so that stuff like \s* works.
	Fix from grep.

2013-10-31         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (efwrite): If write error to stdout is EPIPE,
	die silently.  Thanks to Hermann Peifer for helping find this.

2013-10-22         Arnold D. Robbins     <arnold@skeeve.com>

	Revise error messages when writing to standard output or standard
	error to ignore EPIPE.  Add the ability based on an environment
	variable to get the source file and line number.

	* awk.h (r_warning): Renamed from warning.
	(warning): New macro to set location and call warning.
	* io.c (flush_io): Print errors only if not EPIPE.
	(close_io): Ditto.
	* main.c (lintfunc): Init to r_warning.
	(main): Enhance explanatory comment.
	(usage): Print errors only if not EPIPE.
	(copyleft): Ditto.
	* msg.c (err): Make printing srcfile and srcline depend upon
	GAWK_MSG_SRC environment variable.
	(r_warning): Renamed from warning.

2013-10-17         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Ignore SIGPIPE. See the comment in the code.
	Thanks to Alan Broder for reporting the issue.

	Unrelated:

	* rand.c (do_rand): Fix computation and loop checking against
	1.0 to use do..while.

2013-10-16         Arnold D. Robbins     <arnold@skeeve.com>

	Make -O work again.  Turns out that C99 bool variables
	are clamped to zero or one.

	* main.c (do_optimize): Init to false.
	(main): Set do_optimize to true on -O.
	* eval.c (setup_frame): Change all uses of do_optimize to be
	a boolean check instead of a test > 1.
	* awkgram.y: Ditto.
	(optimize_assignment): Remove check against do_optimize since
	it was inited to true anyway.

	Unrelated:

	* re.c (resetup): Add a comment about the joy of syntax bits.

	Unrelated:

	* builtin.c (do_rand): If result is exactly 1.0, keep trying.
	Thanks to Nelson Beebe.

2013-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (lex): Sync with GNU grep. Handle multibyte \s and \S.

	Unrelated:

	* awk.h [ARRAY_MAXED]: Fix value of this and subsequent flags
	after addition of NULL_FIELD.
	* eval.c (flags2str): Add NULL_FIELD. Duh.

2013-10-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (mk_assignment): Rework switch to handle Op_assign,
	and to provide a better error message upon unknown opcode.

2013-09-28         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2013-09-25         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_rand): Make the result more random by calling
	random() twice. See the comment in the code. Thanks to
	Bob Jewett <jewett@bill.scs.agilent.com> for the report and
	the fix.

2013-09-24         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (find_rule): Handle case where lineno is zero. Can happen
	if break is given without a line number on a current line. Thanks
	to Ray Song <i@maskray.me> for the report.

2013-09-19         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (parse_bracket_exp): Use code from grep to keep things within
	range (updates change of 2013-09-08). Fix whitespace in one of the
	gawk-only additions.

2013-09-13         Arnold D. Robbins     <arnold@skeeve.com>

	Fix use of NF after it's extended, e.g. see test/nfloop.awk.

	* awk.h (NULL_FIELD): New flag
	* builtin.c (do_print_rec): Check f0->flags instead of if
	equal to Nnull_string.
	* eval.c (r_get_field): Check (*lhs)->flags instead of if
	equal to Nnull_string or Null_field.
	* field.c (init_fields): Init field zero and Null_field with
	NULL_FIELD flag.
	(set_NF): Set parse_high_water = NF in case NF extended past the
	end. This is the actual bug fix.

2013-09-08         Arnold D. Robbins     <arnold@skeeve.com>

	Fixes based on reports from a static code checker. Thanks to
	Anders Wallin for sending in the list.

	* array.c (asort_actual): Free list if it's not NULL.
	* builtin.c (do_sub): Set buf to NULL and assert on it before using
	it.
	* cint_array.c (cint_array_init): Clamp any value of NHAT from the
	environment such that it won't overflow power_two_table when used as
	an index.
	* dfa.c (parse_bracket_exp): Check that len is in range before using it
	to index buf.
	* getopt.c (_getopt_internal_r): Change call to alloca to use malloc.
	* io.c (socket_open): Init read_len to zero.
	(two_way_open): Upon failure to fork, close the slave fd also.
	* re.c (research): Init try_backref to false.
	* regcomp.c (build_range_exp): Free any items that were allocated in
	the case where not all items were.
	(build_charclass_op): Same. Init br_token to zero with memset.
	(create_tree): Init token t to zero with memset.
	* regex_internal.c (re_dfa_add_node): Free any items that were
	allocated in the case where not all items were.
	* symbol.c (destroy_symbol): On default, break, to fall into releasing
	of resources.

2013-08-29         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (HAVE_HISTORY_LIST): Move checks and defines to the top.
	(do_save, serialize): Adjust #if checks to depend on having both
	readline and the history functions. Needed for Mac OS X whose
	native readline is a very old version. Sigh.
	* configh.in, configure: Regenerated due to change in m4/readline.m4.
	Issue reported by Hermann Peifer and Larry Baker.

	Unrelated:

	* getopt.c: Sync with GLIBC, changes are minor.

	Unrelated:

	* dfa.c: Sync with version in grep. Primarily whitespace / comment
	wording changes.

2013-08-26         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c (parse_dup_op): Remove RE_TOKEN_INIT_BUG code (change of
	Feb 19 2005) since it's no longer needed.

	* regcomp.c (re_fastmap_iter): Undo addition of volatile from
	Jan 18 2007; no longer needed and is one less change to have to
	maintain against the upstream.

	* regcomp.c, regex.h, regex_internal.h: Sync with GLIBC.

2013-08-22         Arnold D. Robbins     <arnold@skeeve.com>

	* str_array.c (env_store): If the new value being stored is NULL,
	pass in "" instead. Avoids core dump on Mac OS X.
	Thanks to Hermann Peifer for the bug report.

2013-08-20         Arnold D. Robbins     <arnold@skeeve.com>

	* nonposix.h: New file. Contains FAKE_FD_VALUE.
	* awk.h: Include it if MinGW or EMX.
	* Makefile.am (base_sources): Add nonposix.h.

2013-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	Reflect updates to ENVIRON into the real environment.

	* awk.h (init_env_array): Add declaration.
	* main.c (load_environ): Call init_env_array.
	* str_array.c (env_remove, env_store, env_clear, init_env_array):
	New functions.
	(env_array_func): New array vtable.

2013-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (force_array): Set symbol->xarray to NULL before
	initing the array if it was Node_var_new.
	(null_array): Restore assert, undoing change of 2013-05-27.

2013-08-15         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_memory): Fix whitespace / indentation.

2013-08-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (append_rule): Add attempt to insert any comment
	before a rule. Commented out at the moment.

2013-07-30         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (enum opcodeval): Add Op_comment.
	* awkgram.y (comment): New variable to hold comment text.
	(statement): Add saved comments to lists being built.
	(allow_newline): Save comment text if necessary. Append if have
	existing text.
	(yylex): Ditto.
	* debug.c (print_instruction): Handle Op_comment.
	* eval.c (optypes): Add entry for Op_comment.
	* interpret.h (r_interpret): Ditto.
	* profile.c (pprint): For Op_comment, print the comment text.

2013-07-24         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (FAKE_FD_VALUE): Move definition from here ...
	* awk.h (FAKE_FD_VALUE): ... to here. Fixes compilation on MinGW.

2013-07-08         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (get_a_record): Change `min' to `MIN' for consistency with
	other files and general practice.

2013-07-07         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac (AC_CHECK_FUNCS): Check for sigprocmask.
	* io.c (wait_any): If sigprocmask is available, block signals instead
	of ignoring them temporarily.

2013-07-05         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (gawk_api): Document that the api_get_file function will not
	access the file type and length arguments if the file name is empty.

2013-07-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac (AC_CHECK_FUNCS): Add a check for waitpid.
	* io.c (wait_any): Enhance comment to explain why we loop reaping all
	exited children when the argument is zero.  When available, use waitpid
	with WNOHANG to avoid blocking.  Remove my previous incorrect patch to
	exit after reaping the first child.  The function is intended to
	wait for all children, since we are not careful about reaping children
	as soon as they die.

2013-07-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (gawk_api): Remove unused api_lookup_file hook.
	(lookup_file): Remove associated macro.
	* gawkapi.c (api_lookup_file): Remove unused function.
	(api_impl):  Remove unused api_lookup_file hook.

2013-07-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (main_beginfile): Declare new global INSTRUCTION *.
	(parse_program): Set main_beginfile to point to the BEGINFILE
	instruction block.
	* gawkapi.c (api_get_file): After nextfile starts a new file,
	we need to run the BEGINFILE actions.  We retrieve the
	instruction pointer from main_beginfile and execute it until
	we reach the Op_after_beginfile opcode.  We then run after_beginfile
	manually and restore the value of currule and source.

2013-07-04         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_element_t): Add comment indicating that the array
	element index will always be a string!
	* gawkapi.c (api_flatten_array): When converting the index to an awk
	value, request a string conversion, since we want the indices to
	appear as strings to the extensions.  This makes the call to
	force_string redundant, since node_to_awk_value does that internally
	when we request a string.

2013-07-02         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* eval.c (update_ERRNO_string): Set PROCINFO["errno"] to 0.
	* io.c (inrec): Since get_a_record may now return -2, be sure
	to throw an error in that case as well.
	(wait_any): Fix what appears to be a bug.  The old logic repeatedly
	called wait until it failed.  When a process has multiple children,
	this causes it to stall until all of them have exited.  Instead,
	we now exit the function after the first successful wait call.
	(do_getline_redir, do_getline): Handle case where get_a_record
	returns -2.
	(errno_io_retry): New function to decide whether an I/O operation should
	be retried.
	(get_a_record): When read returns an error, call errno_io_retry to
	decide whether the operation should be retried.  If so, return -2
	instead of setting the IOP_AT_EOF flag.

2013-07-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* eval.c (update_ERRNO_int, unset_ERRNO): Update PROCINFO["errno"].

2013-06-30         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (redirect_string): Declare new function that provides API access
	to the redirection mechanism.
	* gawkapi.h (GAWK_API_MINOR_VERSION): Bump from 0 to 1 since 2 new
	hooks were added to the api.
	(gawk_api_t): Add 2 new functions api_lookup_file and api_get_file.
	(lookup_file, get_file): New macros to wrap the new API functions.
	* gawkapi.c (curfile): Declare this extern, since it is needed
	by lookup_file and get_flie.
	(api_lookup_file): Find an open file using curfile or getredirect().
	(api_get_file): Find or open a file using curfile or redirect_string().
	(api_impl): Add api_lookup_file and api_get_file.
	* io.c (redirect_string): Renamed from redirect and changed arguments
	to take a string instead of a 'NODE *'.  This allows it to be called
	through the API's new get_file hook.
	(redirect): Now implemented by calling redirect_string backend function.

2013-07-04         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_tree): Fixes for %c with multibyte characters
	and field width > 1. Bugs reported by Nethox <nethox@gmail.com>.

2013-07-02         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_string): Add a call to chksize and fix another.
	Avoids valgrind errors on profile5 test. Thanks to Andrew
	Schorr for the report.

2013-06-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Minor whitespace cleanup, remove redundant ifdef.

2013-06-24         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (copytoks): Rewrite to call addtok_mb() directly. Avoids
	problems with multibyte characters inside character sets.
	Thanks to Steven Daniels <stevendaniels88@gmail.com> for reporting
	the problem.  Much thanks to Mike Haertel <mike@ducky.net> for the
	analysis and fix.

2013-06-24  Eli Zaretskii  <eliz@gnu.org>

	* io.c: Move #include "popen.h" out of the HAVE_SOCKETS condition,
	as this is needed for non-sockets builds as well.  See
	http://lists.gnu.org/archive/html/bug-gawk/2013-06/msg00014.html
	for the details of the problem this caused.

2013-06-15         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c: Add ifdefs for VMS so that it will compile again.
	Thanks to Anders Wallin.

2013-06-11         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_lines): Move setting of binary mode to after all
	the messing with the fd. Simplifies code some.
	* io.c (srcopen): Rearrange so that can add call to setbinmode
	here too. This fixes the debugger and makes reading source
	files a little faster. Thanks again to Corinna Vinschen.

2013-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (print_lines): Set binary mode so that calculation of the
	byte offsets will be right. Thanks to Corinna Vinschen for the
	direction.

2013-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (check_bracket_exp): Remove warning about ranges being
	locale dependent, since they aren't anymore.

2013-06-09         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (iop_finish): Change fstat call to fcntl/F_GETFL per
	Eli Z., for Windows.

2013-06-03         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (unwind_stack): If exiting, don't worry about strange stuff
	on the stack.

	Unrelated:

	* awk.h (init_sockets): Declare.
	* io.c (init_io): Remove ifdef around call.

2013-06-01  Eli Zaretskii  <eliz@gnu.org>

	* io.c (SHUT_RD) [SD_RECEIVE]: Define to SD_RECEIVE.
	(SHUT_WR) [SD_SEND]: Define to SD_SEND.
	(SHUT_RDWR) [SD_BOTH]: Define to SD_BOTH.
	(FD_TO_SOCKET, closemaybesocket) [!FD_TO_SOCKET]: New macros.
	(SOCKET_TO_FD, SOCKET) [!SOCKET_TO_FD]: New macros.
	(PIPES_SIMULATED): Define only for DJGPP.
	(pipe) [__MINGW32__]: Define to call _pipe, unless PIPES_SIMULATED
	is defined.
	(init_io) [HAVE_SOCKETS]: Call init_sockets.
	(iop_close, socketopen): Call closemaybesocket instead of close.
	(redirect) [__MINGW32__]: Call wait_any with a non-zero argument.
	(devopen) [__EMX__ || __MINGW32__]: Don't call stat on network
	pseudo-filenames.
	(two_way_open) [HAVE_SOCKETS]: Switch input and output to binary
	mode if appropriate.
	(two_way_open) [!PIPES_SIMULATED]: Use the __EMX__ code for MinGW
	as well.
	[__MINGW32__] Call spawnl to invoke $ComSpec and pass it a
	suitably quoted command line.
	(two_way_open) [__MINGW32__]: Wait only for a specified process
	ID.  If successful, update the exit status of the exited process.
	Don't use signals that are undefined on MinGW.
	(two_way_open) [!PIPES_SIMULATED]: Use the __EMX__ code for MinGW
	as well.
	(min): Define only if not already defined.
	(read_with_timeout) [__MINGW32__]: Allow reading from sockets with
	timeout.
	(gawk_fclose) [__MINGW32__]: Close the underlying socket as well.

	* getopt.c: Include stdlib.h for MinGW as well.

2013-05-30         Arnold D. Robbins     <arnold@skeeve.com>

	More profiling fixes:

	* profile.c (pprint): For Op_in_array, parenthesize subscript if
	the precedence is lower. E.g.:  (c = tolower(foo)) in ARRAY.
	(prec_level): Merge cases for precedence of 5.
	(parenthesize): Simplify, as in 3.1.8. Avoids stuff like
	`(x == 1 && (z ==2 && (q == 4 && w == 7)))'.

	Unrelated:

	* io.c (iop_finish): fstat the fd before closing it to avoid
	errors on some operating systems. Thanks to Eli Zaretskii
	for the report.

2013-05-29         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_group3): Renamed from pp_concat. Change all calls.
	(is_binary): Change return type to bool.
	(is_scalar): New function.
	(pp_concat): New function to handle concatenation operator better.
	(pprint): Call it at case Op_concat. Fix Op_K_delete if multiple
	indexes to separate with "][".
	General: Add leading comments as needed.

2013-05-28         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Add minor hack to not run code if pretty printing
	and undocumented env var GAWK_NO_PP_RUN exists.
	* profile.c (pp_string): Explicitly print NUL chars as \000.

2013-05-27         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (AM_INIT_AUTOMAKE): Add dist-lzip to quiet
	outside maintainer warnings.

	Unrelated:

	* configure.ac (AC_STRUCT_ST_BLKSIZE): Replaced with call to
	AC_CHECK_MEMBERS.

	Unrelated:

	* array.c (null_array): Remove the assert and just clear
	symbol->xarray.

2013-05-26         Arnold D. Robbins     <arnold@skeeve.com>

	* getopt.c: For Mac OS X, also include <stdlib.h> to avoid
	some compiler warnings.

2013-05-20         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h [FAKE_FD_VALUE]: Moved from here to ...
	* io.c [FAKE_FD_VALUE]: here.

2013-05-14  Eli Zaretskii  <eliz@gnu.org>

	* io.c (devopen) [__EMX__ || __MINGW32__]: Produce EISDIR on MinGW
	when an attempt to open() a directory fails.
	(two_way_open) [__EMX__ || __MINGW32__]: When trying to open() a
	directory fails with EISDIR, assign FAKE_FD_VALUE to the file
	descriptor and attributes of a directory to its mode bits.  This
	is needed to support the readdir extension.

	* gawkapi.h (FAKE_FD_VALUE): New macro, used in io.h and in
	extension/gawkdirfd.h.

2013-05-09         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.1.0: Release tar ball made.

2013-05-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (snode): Make it a fatal error to use a regexp constant
	as the second argument of index(). Thanks to Christopher Durant
	<christopher.durant@marquesa.net> and Brian Kernighan for the report
	and the advice.

2013-04-28  Eli Zaretskii  <eliz@gnu.org>

	* io.c (redirect): Remove the HACK that called close_one when
	errno was zero in the MinGW build.  This prevents failure in
	several tests in the test suite, e.g., closebad.

2013-04-28         Arnold D. Robbins     <arnold@skeeve.com>

	* bootstrap.sh: Fix a comment.

2013-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (do_getline_redir): Fix the leading comment.

2013-04-23         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (load_procinfo): Add PROCINFO entries for API major
	and minor versions.

2013-04-21         Arnold D. Robbins     <arnold@skeeve.com>

	* missing: Update from Automake 1.13.1.

2013-04-18         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Fix a typo.

2013-04-17         Corinna Vinschen      <vinschen@redhat.com>

	* configure.ac: Remove special casing for cygwin for libiconv
	and libintl.

2013-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* bootstrap.sh: Touch gawk.texi too. Update copyright.

2013-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c: Regenerated from bison 2.7.1.
	* command.c: Ditto.
	* dfa.h, dfa.c: Minor edits to sync with GNU grep.
	* gettext.h: Sync with gettext 0.18.2.1.
	* random.h: Remove obsolete __P macro and use. Update copyright year.
	* Makefile.am, array.c, builtin.c, cint_array.c, cmd.h, debug.c,
	eval.c, ext.c, field.c, gawkapi.c, gawkapi.h, gettext.h, int_array.c,
	interpret.h, msg.c, node.c, profile.c, re.c, replace.c, str_array.c,
	symbol.c: Update copyright year.

	Update to automake 1.13.1:

	* configure.ac (AM_INIT_AUTOMAKE): Update version.
	* configure, Makefile.in, aclocal.m4, awklib/Makefile.in,
	doc/Makefile.in, test/Makefile.in: Regenerated.

	* getopt.c, getopt.h, getopt1.c, getopt_int.h: Sync with GLIBC.

2013-04-14         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (check_funcs): Fix logic of test for called but
	not defined warning. Thanks to Scott Deifik for the bug report.

2013-04-02         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (print_lib_list): Send final newline to prof_fp
	instead of stdout.  Thanks to Hermann Peifer for the bug report.

2013-03-27         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (SUBDIRS): Move extension back into the middle of
	the list so that `make check' without a prior `make' works.

	Unrelated:

	* main.c (main): Move env_lc into ifdef for LIBC_IS_BORKED.

2013-03-20         Arnold D. Robbins     <arnold@skeeve.com>

	For systems where libc is borked (MirBSD, maybe others).

	* dfa.c: Force use of gawk_mb_cur_max instead of MB_CUR_MAX and make
	mbrtowc a macro that always fails.
	(using_utf8): Force utf8 to be 0 if libc borked and gawk_mb_cur_max
	is one.
	* main.c (main): If libc is borked and LC_ALL or LANG exist in the
	environment and are set to "C" or "c", force gawk_mb_cur_max to one.

2013-03-11         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (check_bracket_exp): Make handling of embedded ] in
	regexp smarter. Thanks to Ed Morton <mortoneccc@comcast.net>
	for reporting the bug.

2013-03-01         Arnold D. Robbins     <arnold@skeeve.com>

	Don't build extensions if API isn't supported:

	* Makefile.am (SUBDIRS): Move extension directory to last in case
	building the extensions is not supported.
	* configure.ac: Add check for MirBSD and don't even try to run the
	checks for DYNAMIC if so.

	Check for systems (MirBSD) where libc doesn't understand not
	to use UTF-8 for LC_ALL=C.

	* configure.ac (LIBC_IS_BORKED): AC_DEFINE if needed.
	* regcomp.c (init_dfa): Change logic as needed if LIBC_IS_BORKED.

2013-02-28         Arnold D. Robbins     <arnold@skeeve.com>

	Cause profiling / pretty printing to include a list of
	loaded extensions. Thanks to Hermann Peifer for the bug report.

	* awk.h (srcfiles): Add declaration.
	* profile.c (print_lib_list): New function.
	(dump_prog): Call it.

2013-02-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (expression_list): In case of error return the list
	instead of NULL so that snode gets something it can count.

2013-02-12         Arnold D. Robbins     <arnold@skeeve.com>

	* bisonfix.awk: Comment out code for fixing continued #if
	statements. It is likely not needed anymore. Leave it there in
	case I'm wrong.

2013-02-06         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (printf_common): Move nargs > 0 check into assert.
	(do_sprintf): Add nargs check and fatal message to here.

2013-02-04         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Remove undocumented -m option which was for
	compatibility with BWK awk. His awk dropped it back in 2007.

2013-02-03         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add Automake test for cross compiling.

2013-01-31         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex.c, regex_internal.c, regexec.c: Update
	copyright years to sync with GLIBC.

	From: http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html,
	by Andreas Schwab <schwab@suse.de>:

	* regexec.c (extend_buffers): Add parameter min_len.
	(check_matching): Pass minimum needed length.
	(clean_state_log_if_needed): Likewise.
	(get_subexp): Likewise.`

2013-01-31         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Include "dfa.h" which includes regex.h after limits.h
	so that RE_DUP_MAX gets the correct value. Especially needed on
	OpenVMS. Thanks to Anders Wallin.

	* main.c (version): Print out API version numbers if DYNAMIC.
	Helpful also for knowing if to run the shlib tests.

	* configure: Regenerated after change in m4/readline.m4.

2013-01-31         Arnold D. Robbins     <arnold@skeeve.com>

	* PROBLEMS: Removed. It is no longer needed.
	* Makefile.am (EXTRA_DIST): Remove PROBLEMS from list.

2013-01-31         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac: Remove TEST_MPFR conditional added in last patch.
	We will instead test for MPFR capability by looking at the output
	from gawk --version.

2013-01-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac: Add MPFR test for use in test/Makefile.am.

2013-01-25         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (parms_shadow): Change int param to bool.
	* cmd.h (output_is_tty): Sync type with rest of code (is bool).
	* dfa.c (MALLOC): Undef first, for Irix.
	* Makefile.am (LDADD): Use LIBREADLINE and LIBMPFR instead of
	automake substitutions.
	* configure.ac (AC_INIT): Version bump.
	(GAWK_CHECK_READLINE): Renamed from GNUPG_CHECK_READLINE.

2013-01-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (list_functions): Change parameter to bool.
	* symbol.c (list_functions): Ditto.
	(get_symbols): Change sort parameter to bool. Additional
	code cleanup.

2013-01-22         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (get_symbols): Reset count after each loop to only
	sort the actual items retrieved. Thanks to Hermann Peifer (by
	way of Andrew Schorr) for reporting the bug.  Also add some
	commentary and fix function name in emalloc calls.

2013-01-20         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (regexflags2str): New routine.
	(resetup): If do_intervals, also turn on RE_NO_BK_BRACES.
	Thanks to Yan Lei <yanl.fnst@cn.fujitsu.com> for the
	bug report.

2013-01-18         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a problem with include ordering to get ptrdiff_t definition,
	showed up on Debian Lenny. Reported by Manuel Collado.
	Fix brought over from grep.

	* dfa.h: Include regex.h and stddef.h directly.
	* dfa.c: Adjust includes.

2013-01-11         John Haque            <j.eh@mchsi.com>

	* awk.h (do_mpfr_rshift): Renamed from do_mpfr_rhift.
	* awkgram.y (do_mpfr_rshift): Renamed from do_mpfr_rhift.
	* mpfr.c (_tz1, _tz2, _mpz1, _mpz2, mpz1, mpz2, get_bit_ops,
	free_bit_ops): Removed.
	(init_mpfr): Remove calls to mpz_init.
	(get_intval, free_intval): New functions.
	(do_mpfr_rshift, do_mpfr_lshift): Rework code.
	(do_mpfr_and, do_mpfr_or, do_mpfr_xor): Accept two or more arguments
	to match regular functions.

2013-01-11         Arnold D. Robbins     <arnold@skeeve.com>

	* bisonfix.awk: Adjust ARGV / ARGC to force reading of standard
	input; apparently needed for Mac OS X. Thanks to Akim Demaille
	for the report.

2013-01-06         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (redirect, two_way_open): Set the name field in the
	awk_input_buf_t and awk_output_buf_t structures, as needed.
	Thanks to Manuel Collado for the report.

2013-01-05         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.h (struct re_dfa_t): Restore ifdefs around
	__libc_lock_define, they really were needed. Bleah.

2013-01-01         Arnold D. Robbins     <arnold@skeeve.com>

	Sync with GLIBC regex files.

	* regex_internal.h (struct re_dfa_t): Remove ifdefs around
	__libc_lock_define since it's already defined to empty in non-LIBC
	case.
	* regexec.c (check_node_accept_bytes): Restore decl with use from
	GLIBC code since this is LIBC case.

2012-12-27         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_print, do_printf): Use output_fp as default
	output for print/printf only if running under the debugger.
	Otherwise use stdout as Brian, Peter, and Al intended.

2012-12-25         Arnold D. Robbins     <arnold@skeeve.com>

	Remove sym-constant from API after discussions with John
	Haque and Andrew Schorr.

	* gawkapi.h (api_sym_constant): Removed field in API struct.
	(sym_constant): Remove macro.
	* gawkapi.c (set_constant, api_sym_update, api_sym_constant): Removed.
	(sym_update_real): Renamed to api_sym_update(). is_const parameter
	removed and code adjusted.

2012-12-24         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.0.2: Release tar ball made.

2012-12-23         John Haque      <j.eh@mchsi.com>

	* eval.c (r_get_lhs): Node_array_ref. If original is Node_var,
	don't assign null-string as value.
	* ext.c (get_argument): Node_array_ref. Check if already a scalar.

2011-12-23         John Haque      <j.eh@mchsi.com>

	* awkgram.y (is_deferred_variable): New function.
	(func_install): Call it.
	* eval.c (r_interpret): Op_push_arg. Check for uninitialized scalar.

2012-12-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (tokentab): Whitespace fix for "include".
	* builtin.c (printf_common): Do a fatal error if no args to printf()
	or sprintf().

2012-12-19         Arnold D. Robbins     <arnold@skeeve.com>

	* bootstrap.sh: Touch extension/aclocal.m4 also.

	Unrelated: Extend input parser API:

	* awk.h (IOBUF): Remove read_func pointer.
	* gawkapi.h (awk_input_buf_t): Move it to here.
	* io.c (iop_alloc, get_a_record, get_read_timeout): Adjust code.

	Unrelated: Make sure that variables like NF, NR, FNR are
	accessable correctly both through SYMTAB and through API.

	* gawkapi.c (api_sym_lookup): Call update_global_values().
	(api_sym_lookup_scalar): Ditto.
	* interpret.h (Op_subscript, Op_subscript_lhs): Ditto.
	* main.c (update_global_values): Adjust comment.

	Unrelated: Fix --disable-lint so that everything compiles.

	* main.c (main): Move case label inside ifdef.
	* awkgram.y (isnoeffect): Add ifdefs around declaration, use,
	and function body.

	Unrelated: Restore building with tcc.

	* awk.h (AFUNC): Move to array.c which is the only place its used.
	(ainit_ind, atypeof_ind, etc.): New macros for use in array.c
	* array.c (AFUNC): Change to use F##_ind. Works with tcc and other
	compilers.
	* configure.ac: Only add -export-dynamic flag if compiling with gcc.

2012-12-18         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (sym_update_real): If setting a scalar variable that exists
	already in an undefined state with type set to Node_var_new, we must
	update the type to Node_var if the new value is not undefined.

2012-12-18         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (tokentab): "extension" needs to be inside ifdef DYNAMIC.
	Thanks to Anders Wallin for finding this.

2012-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c (do_set_var): Fix last remaining `*assoc_lookup() = x'.

2012-12-15         Arnold D. Robbins     <arnold@skeeve.com>

	Infrastructure Updates:

	* awkgram.c, command.c: Regenerated with bison 2.7.
	* config.guess, config.sub, depcomp: Updated from automake 1.12.6.

2012-12-09         Arnold D. Robbins     <arnold@skeeve.com>

	Clean up BINMODE to use symbolic values.

	* awk.h (enum binmode_values): New enum.
	* eval.c (set_BINMODE): Use them.
	* io.c (binmode, close_rp, gawk_popen): Ditto.
	* main.c (main): Ditto.
	* builtin.c (do_system): Ditto.

	Unrelated:

	* configure.ac: Look for posix_openpt
	* io.c (two_way_open): Use posix_openpt if it's available.
	Thanks to Christian Weisgerber <naddy@mips.inka.de> for
	the changes.

	Also unrelated:

	* regex.c: Don't include <sys/param.h> on VMS. Thanks to
	Anders Wallin.

	Also unrelated:

	* ext.c (is_letter, is_identifier_char): New functions. Don't use
	<ctype.h> functions since those could rely on the locale.
	(make_builtin): Adjust test for valid name to call the new
	functions and return false instead of throwing a fatal error.
	(make_old_builtin): Adjust test for valid name to call the new
	function.
	* awk.h (is_identchar): Move from here, ...
	* awkgram.y (is_identchar): ... to here. This is safe, since
	the locale is C during parsing the program.

	Also unrelated: Make all checks for bitflags being set consistent
	in case we should wish to switch them to macro calls:

	* awkgram.y, builtin.c, cint_array.c, debug.c, eval.c, gawkapi.c,
	int_array.c, io.c, mpfr.c, node.c, profile.c, str_array.c: Fix
	as needed.

2012-12-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (tokentab): `fflush()' is now in POSIX, remove the
	RESX flag. This was the last use, so delete the flag.
	(yylex): Don't check RESX.

	Thanks to Nathan Weeks <weeks@iastate.edu> for helping make this
	happen.

2012-12-01         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h: For op_assign_concat, if both strings
	have WSTRCUR, then do the realloc() and append for the
	wide string too.  Thanks to Janis Papanagnou
	<janis_papanagnou@hotmail.com> for the discussion in
	comp.lang.awk.

2012-11-30         Arnold D. Robbins     <arnold@skeeve.com>

	* regcomp.c, regex.c, regex_internal.h, regexec.c: Sync
	with GLIBC.  Why not.

	* gawkapi.c (awk_bool_t): Change into an enum with awk_false and
	awk_true values.

2012-01-30         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	Further cleanups of macros in awk.h

	* awk.h (_r, _t): Remove declarations.
	(unref, m_force_string): Remove macros.
	(r_unref): Move declaration.
	(r_force_string): Remove declaration.
	(DEREF, force_string, force_number, unref): Now inline functions.
	(POP_STRING, TOP_STRING): Back to macros.
	* eval.c (_t): Remove definition.
	* main.c (_r): Remove definition.
	* node.c (r_force_string): Remove.

2012-11-27         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_fflush): Make fflush() and fflush("") both
	flush everything. See the comment in the code.

2012-11-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (Node_old_ext_func, Op_old_ext_func): New enum values.
	* configure.ac: Use -export-dynamic if supported for old extension
	mechanism.
	* eval.c (nodeytpes): Add Node_old_ext_func.
	(optypetab): Add Op_old_ext_func.
	* ext.c (make_old_ext_builtin): "New" function.
	* interpret.h: Special case Op_old_ext_builtin. Add checks for
	Node_old_ext_func.
	* msg.c: Adjust placement of a comment.

2012-05-02         John Haque      <j.eh@mchsi.com>

	* str_array.c (str_copy): Initialize next pointer in the linked list
	to avoid memory corruption.
	* int_array.c (int_copy): Ditto.

2012-04-21         John Haque      <j.eh@mchsi.com>

	Shutdown routine for a dynamic extension.

	* awk.h (SRCFILE): New field fini_func.
	* ext.c (load_ext): Takes an additional argument to look up and
	save the clean up routine in SRCFILE struct.
	(INIT_FUNC, FINI_FUNC): Defines for default init and fini routine
	names.
	(do_ext): Use default for the name of the init or fini routine if
	one is not supplied. Adjust call to load_ext().
	(close_extensions): Execute fini routines.
	* interpret.h (Op_at_exit): Call close_extensions().
	* msg.c (gawk_exit): Ditto.
	* debug.c (close_all): Ditto.
	* main.c (main): Adjust call to load_ext().
	* awkgram.y (tokentab): Specify 2nd and 3rd optional arguments
	for the extension() built-in.

	Unrelated:

	* interpret.h (Op_arrayfor_init): Use assoc_length for array size.

2012-04-19         John Haque      <j.eh@mchsi.com>

	Enhanced array interface to support transparent implementation
	using external storage and ...

	* awk.h (astore): Optional post-assignment store routine for
	array subscripts.
	(Op_subscript_assign): New opcode to support the store routine.
	(alength): New array interface routine for array length.
	(assoc_length): New macro.
	(assoc_empty): Renamed from array_empty.
	* awkgram.y (snode): Append Op_subscript_assign opcode if
	(g)sub variable is an array element.
	(mk_getline): Same for getline variable.
	(mk_assignment): Same if assigning to an array element.
	* field.c (set_element): Call store routine if needed.
	* builtin.c (do_match): Ditto.
	(do_length): Use length routine for array size.
	* symbol.c (print_vars): Ditto.
	* array.c (null_length): Default function for array length interface.
	(asort_actual):	Call store routine if defined.
	(asort_actual, assoc_list): Use length routine for array size.
	(null_array_func): Add length and store routine entries.
	* str_array.c (str_array_func): Same.
	* cint_array.c (cint_array_func): Same.
	* int_array.c (int_array_func): Same.
	* eval.c (optypetab): Add Op_subscript_assign.
	* profile.c (pprint): Add case Op_subscript_assign.
	* interpret.h (set_array, set_idx): New variables to keep track
	of an array element with store routine.
	(Op_sub_array, Op_subscript_lhs, Op_store_sub, Op_subscript_assign):
	Add code to handle array store routine.
	* debug.c (print_symbol, print_array, cmp_val, watchpoint_triggered,
	initialize_watch_item): Use length routine for array size.

	* awk.h (assoc_kind_t): New typedef for enum assoc_list_flags.
	(sort_context_t): Renamed from SORT_CONTEXT.
	* array.c (asort_actual, assoc_sort): Adjust.
	* cint_array.c (cint_list, tree_list, leaf_list): Adjust.
	* int_array.c (int_list): Adjust.
	* str_array.c (str_list): Adjust.

2012-04-18         John Haque      <j.eh@mchsi.com>

	* awk.h (atypeof, AFUNC): New macros.
	(afunc_t): Renamed typedef from array_ptr.
	* array.c (register_array_func, null_lookup): Use AFUNC macro
	instead of hard-coded index for array functions.
	(asort_actual): Unref null array elements before overwriting.
	(force_array): Renamed from get_array.
	(null_array): Renamed from init_array. Also initialize flags to 0.
	(array_types): Renamed from atypes.
	(num_array_types): Renamed from num_atypes.
	* interpret.h (r_interpret): In case Op_sub_array, unref null array element.
	* str_array.c (str_array_init): Reworked for (re)initialization of array.
	* int_array.c (int_array_init): Ditto.
	* cint_array.c (cint_array_init): Ditto.

2012-11-24         Arnold D. Robbins     <arnold@skeeve.com>

	Directory cleanup.

	* TODO.xgawk, FUTURES: Merged into TODO.
	* TODO: More stuff added.
	* Makefile.am (EXTRA_DIST): Updated.

2012-11-22         Arnold D. Robbins     <arnold@skeeve.com>

	Cleanup of awk.h.

	* array.c (r_in_array): Removed.
	* awk.h (MALLOC_ARG_T): Replaced with size_t everywhere.
	(S_ISREG, setsid): Moved to io.c.
	(__extension__): Removed.
	(INT32_BIT): Moved to cint_array.c.
	(_t): Always declare.
	(DO_LINT_INVALID, et al): Moved into an enum.
	(POP_ARRAY, POP_PARAM, POP_SCALAR, TOP_SCALAR, dupnode, in_array):
	Moved into inline functions.
	(force_number, force_string): Simplified.
	(ZOS_USS): Remove undef of DYNAMIC, it's handled in configure.ac.
	* io.c (S_ISREG, setsid): Moved to here.
	* cint_array.c (INT32_BIT): Moved to here.
	* eval.c (_t): Always define.
	* protos.h: Use size_t directly instead of MALLOC_ARG_T.

	Unrelated:

	* gawkapi.h: Add `awk_' prefix to structure tags where they
	were missing.  Document the full list of include files needed.

2012-11-14         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (do_find_source): On VMS, don't add the `/' separator.
	Thanks to Anders Wallin.

	MPFR minor cleanup:

	* awk.h (mpfr_unset): Declare new function.
	* mpfr.c (mpfr_unset): New function.
	* node.c (r_unref): Call it instead of inline code.
	* gawk_api.c (api_sym_update_scalar): Call it instead of inline code.

2012-11-13         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (get_symbols): Check type, not vname. Keeps
	valgrind happy. Thanks to Andrew Schorr for noticing the problem.

2012-11-10         Arnold D. Robbins     <arnold@skeeve.com>

	* Update to bison 2.6.5. Various files regenerated.
	* io.c (find_source): Add a default value for SHLIBEXT.
	(read_with_timeout): For VMS also, just use read().

2012-11-10         John Haque      <j.eh@mchsi.com>

	* int_array.c (int_copy): Initialize next pointer of newchain to null.
	* eval.c (eval_condition): Force string context for an integer used
	as array index.

2012-11-10         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (api_add_ext_func, api_awk_atexit, api_clear_array,
	api_create_array, api_create_value, api_register_ext_version,
	api_release_value, api_update_ERRNO_string, node_to_awk_value,
	remove_element, run_ext_exit_handlers): Add null pointer checks.
	Everywhere: Add / fixup leading comments.

	* interpret.h (Op_store_sub): If assigning to an uninitialized variable
	through SYMTAB, change it to Node_var. Add explanatory comments.
	* symbol.c (get_symbol): Rationalized. Skip non-variables in SYMTAB.

2012-11-04         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Minor documentation edit.

2012-10-31         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (want_regexp): Use as a bool, not as an int.
	* field.c: Fix a comment.
	* gawkapi.h: Add comment to include <errno.h>.
	* symbol.c (load_symbols): ``No automatic aggregate initialization.''
	Here too. Sigh again.

	* gawkapi.h: Minor documentation edits.

2012-11-27         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_fflush): Make fflush() and fflush("") both
	flush everything. See the comment in the code.

2012-10-28         Arnold D. Robbins     <arnold@skeeve.com>

	* Update to bison 2.6.4. Various files regenerated.

2012-10-27         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Continuing the minor formatting / doc cleanups.

2012-10-26         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Continuing the minor formatting / doc cleanups.

2012-10-24         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Still more minor formatting / doc cleanups.

2012-10-23         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: More minor formatting / doc cleanups.

2012-10-21         Arnold D. Robbins     <arnold@skeeve.com>

	Fixes for z/OS from Dave Pitts.

	* awk.h (assoc_list_flags): No trailing comma on last enum value.
	* gawkapi.h (awk_valtype_t): Ditto.
	* symbol.c (lookup): ``No automatic aggregate initialization.'' Sigh.

	Unrelated:

	* gawkapi.h: Minor formatting / doc cleanups.

2012-10-19         Arnold D. Robbins     <arnold@skeeve.com>

	If SYMTAB is used, make sure ENVIRON and PROCINFO get loaded too.

	* awkgram.y (process_deferred): New function. Call it when program
	is completely parsed.
	(symtab_used): New variable.
	(variable): Set it to true if SYMTAB is looked up.
	* main.c (load_environ, load_procinfo): Make sure the routines are
	only called once.

	Unrelated fixes:

	* awkgram.y (yylex): Check continue_allowed and break_allowed as
	soon as they are seen in the scanner; the rules that check them
	can not be reduced until after a token that allows them is seen,
	leading to errors at execution time.
	* interpret.h (Op_K_break, Op_K_continue, Op_jmp): Add assertion
	that pc->target_jmp is not NULL.

	* symbol.c (lookup): Correct a comment.

2012-10-14         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (IOBUF_PUBLIC): Renamed awk_input_buf_t.
	(struct iobuf_public): Renamed struct awk_input.
	* awk.h: Adjust.

2012-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	* Update to Automake 1.12.4. Various files regenerated.

2012-10-11         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (dup_ent): New member for Node_param_list.
	* symbol.c (install): For parameters, if this is a duplicate, chain
	it off the original using the dup_ent pointer.
	(remove_params): If there's a duplicate, remove it from the list.

	* awk.h: Fix flags to have unique numeric values. Oops.

2012-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Add considerably more documentation. Rearrange order
	of functions in the struct to make more sense, grouping related
	functions together in a more logical order.
	* gawkapi.c: Adjust as needed.
	* ext.c (make_builtin): Adjust for name change in struct member.

2012-10-05         Arnold D. Robbins     <arnold@skeeve.com>

	* mbsupport.h: Add a bunch of undefs for z/OS.

2012-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* TODO.xgawk: Update.
	* awk.h (make_str_node): Removed macro.
	(make_string): Modified to call make_str_node.
	(r_make_str_node): Renamed to make_str_node.
	* gawkapi.c: Changed r_make_str_node to make_str_node everywhere.
	* node.c (make_str_node): Renamed from make_str_node.

	Update to automake 1.12.4.

	* Makefile.in, aclocal.m4, awklib/Makefile.in, doc/Makefile.in,
	extension/Makefile.in, extension/aclocal.m4, test/Makefile.in:
	Regenerated.

	* interpret.h (Op_Subscript): Added lint warnings for FUNCTAB
	and SYMTAB.

2012-10-02         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (func_table): Declare.
	* awkgram.y: If do_posix or do_traditional, then check for
	delete on SYMTAB. Add check for delete on FUNCTAB, also.
	* interpret.h (Op_Subscript): For FUNCTAB, return the element name
	as its value too.  Avoids lots of weirdness and allows indirect calls
	after assignment from FUNCTAB["foo"] to work.
	(Op_store_sub): Disallow assignment to elements of FUNCTAB.
	(Op_indirect_func_all): Turn assert into check and fatal error.
	* symbol.c (func_table): No longer static.
	(lookup): If do_posix or do_traditional, skip the global table.
	(release_all_vars): Clear func_table too.

2012-09-25         Arnold D. Robbins     <arnold@skeeve.com>

	First cut at SYMTAB and FUNCTAB. This does the following:
	- Change symbol table handling to use gawk arrays.
	- Store symbols in SYMTAB array and allow indirect access
	  through SYMTAB to variables, both getting and setting.
	- List function names in FUNCTAB indexes; Values cannot be
	  used at the moment.
	- No documentation yet.

	* awk.h (Node_hashnode, hnext, hname, hlength, hcode, hvalue):
	Removed, not needed any more.
	(init_symbol_table, symbol_table): Add declarations.
	* awkgram.y: Disallow delete on SYMTAB, fix warning for tawk
	extension if traditional.
	* eval.c (nodetypes): Remove Node_hashnode element.
	* interpret.h (Op_subscript, Op_store_sub): Handle SYMTAB and go
	through to the actual value.
	* main.c (main): Init Nnull_string earlier. Add call to
	init_symbol_table().
	* profile.c (pp_str, pp_len): Change definitions.
	(pp_next): New macro.
	(pp_push, pp_pop): Adjust uses.
	* symbol.c (variables): Removed.
	(global_table, param_table, func_table, symbol_table,
	installing_specials): New variables.
	(lookup, make_params, install_params, remove_params, remove_symbol,
	make_symbol, install, get_symbols, release_all_vars, append_symbol,
	release_symbols, load_symbols): Rework logic considerably.
	(init_symbol_table): New function.

2012-09-23         Arnold D. Robbins     <arnold@skeeve.com>

	`delete array' and `nextfile' are now in POSIX.
	Thanks to Nathan Weeks <weeks@iastate.edu> for the
	initiative and letting us know about it.

	* awkgram.y: Make the right code changes for `delete array'
	and `nextfile'.
	(tokentab): Set flags to zero for nextfile.

2012-09-19         Arnold D. Robbins     <arnold@skeeve.com>

	* symbol.c (load_symbols): Zero out the new node. Prevents assertion
	failure on PPC Mac OS X.

2012-09-14         Arnold D. Robbins     <arnold@skeeve.com>

	Allow read-only access to built-in variables from extensions.

	* awk.h (NO_EXT_SET): New flag.
	* gawkapi.c (api_sym_lookup, api_sym_update_real): Set flag if off
	limits variable instead of failing. Adjust logic.
	(api_sym_update_scalar, api_set_array_element, api_del_array_element,
	api_release_flattened_array): Adjust logic.
	* gawkapi.h: Adjust documentation.

	Provide PROCINFO["identifiers"]. Undocumented for now.

	* awk.h (load_symbols): Add declaration.
	* awkgram.y (variable): Adjust comment formatting.
	* main.c (main): Call load_symbols().
	* symbol.c (load_symbols): New function.

2012-09-13         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Determination of DYNAMIC adjusted. Hopefully is
	smarter for z/OS.

2012-09-13         Dave Pitts            <dpitts@cozx.com>

	* awk.h: Add defines for z/OS for newer types.

2012-08-31         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c: Wrap various bits in #ifdef DYNAMIC so that
	gawk will compile on systems without dynamic loading.

2012-08-24         Arnold D. Robbins     <arnold@skeeve.com>

	Add version facility to API. Thanks to Manuel Collado
	for the idea.

	* awk.h (print_ext_versions): Declare.
	Rearrange includes and decls to make more sense.
	* gawkapi.h (register_ext_version): New API.
	(dl_load_func): Add code for ext_version.
	* gawkapi.c (api_register_ext_version, print_ext_versions):
	New functions.
	* main.c (do_version): New variable.
	(optab): Set it for -v / --version.
	(main): Set it in arg parsing switch. Call version() after the
	extensions have been loaded.

2012-08-22         Arnold D. Robbins     <arnold@skeeve.com>

	Add output wrapper and two-way processor to extension API.

	* awk.h (struct redirect): Replace output FILE * with awk_output_buf_t.
	(register_output_wrapper, register_two_way_processor): Declare.
	* builtin.c (efwrite): Adjust logic to use rp->output data and
	functions if rp is not NULL. Remove redundant declaration of function.
	(do_fflush, do_printf, do_print, do_print_rec): Same adjustment.
	* ext.c (make_builtin): Adjust error messages.
	* gawkapi.c (api_register_output_wrapper,
	api_register_two_way_processor): New functions.
	(sym_update_real): Adjust code formatting.
	* gawkapi.h (awk_input_parser_t): Make next pointer awk_const.
	(awk_output_buf_t, awk_two_way_processor_t): New structs.
	(api_register_output_wrapper, api_register_two_way_processor): New APIs.
	(dl_load_func): Allow for empty function table (NULL elements).
	* io.c (find_output_wrapper, init_output_wrapper, find_two_processor,
	gawk_fwrite, gawk_ferror, gawk_fflush, gawk_fclose): New functions.
	(redirect): Call init_output_wrapper, find_output_wrapper as needed.
	Adjust use of rp->fp to rp->output.fp and also function calls.
	(close_rp, close_redir, flush_io): Same adjustment.
	(two_way_open): Same adjustment. Call find_two_way_processor, and
	find_output_wrapper, as needed.

2012-08-17         Arnold D. Robbins     <arnold@skeeve.com>

	* Update infrastructure: Automake 1.12.3 and bison 2.6.2.

2012-08-15         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync w/GNU grep.

2012-08-12         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Make the versions enum constants instead of defines.

2012-08-11         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (add_srcfile): It is now a fatal error to load the
	same file with -f and -i (or @include).
	* TODO.xgawk: Update to reflect this change.

2012-08-10         Arnold D. Robbins     <arnold@skeeve.com>

	* FUTURES, TODO.xgawk: Updates.

2012-08-08         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add -DNDEBUG to remove asserts if not developing.

	* gawkapi.h: Document how to build up arrays.
	* gawkapi.c (api_sym_update): For an array, pass the new cookie
	back out to the extension.

	* awk.h (IOBUF): Move struct stat into IOBUF_PUBLIC.
	(os_isreadable): Change to take an IOBUF_PUBLIC.
	* gawkapi.h (IOBUF_PUBLIC): Received struct stat.
	(INVALID_HANDLE): Moves to here.
	* io.c (iop_alloc): Stat the fd and fill in stat buf.
	(iop_finish): Use passed in stat info.

2012-08-05         Arnold D. Robbins     <arnold@skeeve.com>

	* README.git: More stuff added.

2012-08-01         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (iop_finish): New function.
	(iop_alloc): Add errno_val parameter. Move code into iop_finish.
	Add large explanatory leading comment.
	(after_beginfile): Rework logic. Check for input parser first, then
	check for invalid iop.
	(nextfile): Organize code better. Call iop_alloc then iop_finish.
	(redirect): Call iop_alloc, find_input_parser, iop_finish.
	(two_way_open): Call iop_alloc, find_input_parser, iop_finish.
	(gawk_popen): Call iop_alloc, find_input_parser, iop_finish.
	(find_input_parser): Set iop->valid if input parser takes control.
	(get_a_record): Rework setting RT to use macros.

2012-07-29         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awk.h (set_RT_to_null, set_RT): Removed.
	* gawkapi.h (api_set_RT): Removed.
	(get_record): Signature changed in input parser struct.
	* gawkapi.c (api_set_RT): Removed.
	* io.c (set_RT_to_null, set_RT): Removed.
	(get_a_record): Adjustments for new API for input parser.

2012-07-29         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (os_isreadable): Adjust declaration.
	(struct iobuf): Add new member `valid'.
	* io.c (iop_alloc): Remove do_input_parsers parameter, it's
	always true. Adjust logic to set things to invalid if could not
	find an input parser.
	(after_beginfile): Use valid member to check if iobuf is valid.
	Don't clear iop->errcode.
	(nextfile): Adjust logic to clear errcode if valid is true and
	also to update ERRNO.
	(redirect): Check iop->valid and cleanup as necessary, including
	setting ERRNO.
	(two_way_open): Ditto.
	(gawk_popen): Ditto.
	(devopen): Remove check for directory.

2012-07-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (find_input_parser): Issue a warning if take_control_of fails.

2012-07-27         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (set_RT): Change to take a NODE * parameter.
	* io.c (set_RT): Change to take a NODE * parameter.
	* gawkapi.h: Change open hook to input parser in comment.
	* gawkapi.c (api_set_RT): Adjust call to set_RT.

2012-07-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (set_RT_to_null, set_RT): Declare functions.
	(os_isreadable): Declare function.
	* io.c (set_RT_to_null, set_RT): New functions.
	(iop_close): Init ret to zero.
	* gawkapi.c (api_register_input_parser): Check for null pointer.
	(api_set_RT): New function.
	* gawkapi.h (api_set_RT): New function.

2012-07-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (IOBUF_PUBLIC): Document the get_record and close_func
	API.
	(awk_input_parser_t) Change can_take_file argument to const, and
	document the API.
	* io.c (get_a_record): Document that the caller initializes *errcode
	to 0, and remote the test for non-NULL errcode.

2012-07-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_sym_update_scalar): Fix some minor bugs.  Was
	not updating AWK_NUMBER when valref != 1.  And strings were not
	freeing MPFR values.

2012-07-25         Arnold D. Robbins     <arnold@skeeve.com>

	Start refactoring of IOBUF handling and turn "open hooks"
	into "input parsers".

	* awk.h (IOP_NOFREE_OBJ): Flag removed.
	(register_input_parser): Renamed from register_open_hook.
	* ext.c (load_ext): Make sure lib_name is not NULL.
	* gawk_api.c (api_register_input_parser): Renamed from
	api_register_open_hook.
	* gawk_api.h (api_register_input_parser): Renamed from
	api_register_open_hook.  Rework structure to have "do you want it"
	and "take control of it" functions.
	* io.c (iop_alloc): Remove third argument which is IOBUF pointer.
	Always malloc it. Remove use of IOP_NOFREE_OBJ everywhere.
	(find_input_parser): Renamed from find_open_hook.
	(nextfile): Don't use static IOBUF.
	(iop_close): Call close_func first. Then close fd or remap it
	if it's still not INVALID_HANDLE.
	(register_input_parser): Renamed from register_open_hook.
	Use a FIFO list and check if more than one parser will accept the
	file. If so, fatal error.

2012-07-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac: Instead of using acl_shlibext for the shared library
	extension, define our own variable GAWKLIBEXT with a hack to work
	correctly on Mac OS X.
	* Makefile.am (SHLIBEXT): Use the value of GAWKLIBEXT instead of
	acl_shlibext.

2012-07-24         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add crude but small hack to make plug-ins work
	on Mac OS X.

2012-07-20         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Rework table to not take up so much space.
	* gawkapi.c (api_sym_update_scalar): Rework optimization code
	to clean up the function.

2012-07-17         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h: Add comments explaining new api_create_value and
	api_release_value functions.
	* gawkapi.c (sym_update_real): Allow updates with AWK_SCALAR and
	AWK_VALUE_COOKIE types.  After creating a regular variable,
	remove the call to unref(node->var_value), since this is not
	done elsewhere in the code (see, for example, main.c:init_vars).
	If the update is for an existing variable, allow any val_type
	except AWK_ARRAY (was previously disallowing AWK_SCALAR and
	AWK_VALUE_COOKIE for no apparent reason).
	(api_sym_update_scalar): The switch should return false for an
	invalid val_type value, so change the AWK_ARRAY case to default.
	(valid_subscript_type): Any scalar value is good, so accept any valid
	type except AWK_ARRAY.
	(api_create_value): Accept only AWK_NUMBER and AWK_STRING values.
	Anything else should fail.

2012-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	Speedup:

	* awk.h (r_free_wstr): Renamed from free_wstr.
	(free_wstr): Macro to test the WSTRCUR flag first.
	* node.c (r_free_wstr): Renamed from free_wstr.

	Support value cookies:

	* gawkapi.h (awk_val_type_t): Add AWK_VALUE_COOKIE.
	(awk_value_cookie_t): New type.
	(awk_value_t): Support AWK_VALUE_COOKIE.
	(api_create_value, api_release_value): New function pointers.
	* gawkapi.c (awk_value_to_node, api_sym_update_scalar,
	valid_subscript_type): Handle AWK_VALUE_COOKIE.
	(api_create_value, api_release_value): New functions.

2012-07-16         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (awk_value_to_node): Support AWK_SCALAR.
	(api_sym_update_scalar): Performance improvements.

2012-07-12         Arnold D. Robbins     <arnold@skeeve.com>

	Allow creation of constants. Thanks to John Haque for the
	implementation concept.

	* gawk_api.h (api_sym_constant): Create a constant.
	* gawk_api.h (api_sym_update_real): Renamed from api_sym_update.
	Add is_const parameter and do the right thing if true.
	(api_sym_update, api_sym_constant): Call api_sym_update_real
	in the correct way.
	(set_constant): New function.

2012-07-11         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h: Fix typo in comment.
	(awk_value_t): Type for scalar_cookie should be awk_scalar_t,
	not awk_array_t.
	(gawk_api): Add new api_sym_lookup_scalar function.
	(sym_lookup_scalar): New wrapper macro for api_sym_lookup_scalar hook.
	* gawkapi.c (api_sym_lookup_scalar): New function for faster scalar
	lookup.
	(api_impl): Add entry for api_sym_lookup_scalar.

2012-07-11         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (awk_value_to_node): Change to a switch statement
	so AWK_SCALAR or other invalid type is handled properly.
	(valid_subscript_type): Test whether a value type is acceptable
	for use as an array subscript (any scalar value will do).
	(api_get_array_element, api_set_array_element, api_del_array_element):
	Use new valid_subscript_type instead of restricting to string values.

2012-07-11         Arnold D. Robbins     <arnold@skeeve.com>

	Lots of API work.

	* gawkapi.h: Function pointer members renamed api_XXX and
	macros adjusted. More documentation.
	(awk_valtype_t): New AWK_SCALAR enum for scalar cookies.
	(awk_scalar_t): New type.
	(awk_value_t): New member scalar_cookie.
	(api_sym_update_scalar): New API function.
	(erealloc): New macro.
	(make_const_string): New macro, renamed from dup_string.
	(make_malloced_string): New macro, renamed from make_string.
	(make_null_string): New inline function.
	(dl_load_func): Add call to init routine through pointer if
	not NULL.

	* gawkapi.c (awk_value_to_node): Assume that string values came
	from malloc.
	(node_to_awk_value): Handle AWK_SCALAR.
	(api_sym_update): Ditto.
	(api_sym_update_scalar): New routine.
	(api_get_array_element): Return false if the element doesn't exist.
	Always unref the subscript.
	(remove_element): New helper routine.
	(api_del_array_element): Use it.
	(api_release_flattened_array): Ditto.
	(api_impl): Add the new routine.

2012-07-11         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_sym_update): Allow val_type to be AWK_UNDEFINED
	for setting a variable to "", i.e. dupnode(Nnull_string).

2012-07-10         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (add_srcfile): Lint warning message for a previously loaded
	shared library should say "already loaded shared library" instead
	of "already included source file".

2012-07-08         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (set_array_element): Use index + value instead
	of element structure. Matches get_array_element.
	(set_array_element_by_elem): New macro to use an element.
	* gawkapi.c (api_set_array_element): Make the necessary adjustments.

2012-07-04         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (tokentab): Remove limit on number of arguments
	for "and", "or", and "xor".
	* builtin.c (do_and, do_or, do_xor): Modify code to perform the
	respective operation on any number of arguments. There must be
	at least two.

2012-06-29         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Improve the documentation of the return values
	per Andrew Schorr.

2012-06-25         Arnold D. Robbins     <arnold@skeeve.com>

	* TODO.xgawk: Updated.
	* awk.h (track_ext_func): Declared.
	* awkgram.y (enum defref): Add option for extension function.
	(struct fdesc): Add member for extension function.
	(func_use): Handle extension function, mark as extension and defined.
	(track_ext_func): New function.
	(check_funcs): Update logic for extension functions.
	* ext.c (make_builtin): Call track_ext_func.

2012-06-24         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Most of IOBUF has been hidden.
	* gawkapi.h (IOBUF): Remove declaration (now back in awk.h).
	(IOBUF_PUBLIC): Declare new structure defining subset of IOBUF fields
	that should be exposed to extensions.
	(gawk_api): Update register_open_hook argument from IOBUF to
	IOBUF_PUBLIC.
	* awk.h (IOBUF): Restore declaration with 5 fields moved to new
	IOBUF_PUBLIC structure.
	(register_open_hook): Update open_func argument from IOBUF to
	IOBUF_PUBLIC.
	* gawkapi.c (api_register_open_hook): Ditto.
	* io.c (after_beginfile, nextfile, iop_close, gawk_pclose): Some fields
	such as fd and name are now inside the IOBUF public structure.
	(struct open_hook): Update open_func argument from IOBUF to
	(register_open_hook): Ditto.
	(find_open_hook): opaque now inside IOBUF_PUBLIC.
	(iop_alloc): fd and name now in IOBUF_PUBLIC.
	(get_a_record): If the get_record hook returns EOF, set the IOP_AT_EOF
	flag.  Access fd inside IOBUF_PUBLIC.
	(get_read_timeout): File name now inside IOBUF_PUBLIC.
	* interpret.h (r_interpret): File name now inside IOBUF_PUBLIC.
	* ext.c (load_ext): No need to call return at the end of a void
	function.

2012-06-24         Arnold D. Robbins     <arnold@skeeve.com>

	* ext.c (load_ext): Don't return a value from a void function.
	* gawkapi.c (api_set_array_element): Set up vname and parent_array.

2012-06-21         Arnold D. Robbins     <arnold@skeeve.com>

	More API and cleanup:

	* awk.h (stopme): Make signature match other built-ins.
	* awkgram.y (stopme): Make signature match other built-ins.
	(regexp): Minor edit.
	* gawkapi.c (api_set_argument): Remove unused variable.
	Set parent_array field of array value.
	* TODO.xgawk: Update some.

	Remove extension() builtin.

	* awk.h (do_ext): Removed.
	(load_ext): Signature changed.
	* awkgram.y (tokentab): Remove do_ext.
	Change calls to do_ext.
	* ext.c (load_ext): Make init function a constant.
	* main.c (main): Change calls to do_ext.

2012-06-20         Arnold D. Robbins     <arnold@skeeve.com>

	Restore lost debugging function:

	* awkgram.y (stopme): Restore long lost debugging function.
	* awk.h (stopme): Add declaration.

	API work:

	* ext.c (get_argument): Make extern.
	* awk.h (get_argument): Declare it.
	* gawkapi.c (api_set_argument): Call it. Finish off the logic.
	(api_get_argument): Refine logic to use get_argument.
	* gawkapi.h (set_argument): New API.

2012-06-19         Arnold D. Robbins     <arnold@skeeve.com>

	Remove code duplication in gawkapi.c from msg.c:

	* awk.h (err): Add `isfatal' first parameter.
	* awkgram.y (err): Adjust all calls.
	* msg.c (err): Adjust all calls. Move fatal code to here ...
	(r_fatal): From here.
	* gawkapi.c: Remove code duplication and adjust calls to `err'.

	Handle deleting elements of flattened array:

	* awk.h (get_argument): Remove declaration.
	* ext.c (get_argument): Make static.
	* gawkapi.h (awk_flat_array_t): Make opaque fields const. Add
	more descriptive comments.
	* gawkapi.c (release_flattened_array): Delete elements flagged
	for deletion. Free the flattened array also.

	Add additional debugging when developing:

	* configure.ac: Add additional debugging flags.
	* configure: Regenerated.

2012-06-18         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (get_array_element): Restore `wanted' parameter.
	(awk_element_t): Use awk_value_t for index. Add awk_flat_array_t.
	(flatten_array): Change signature to use awk_flat_array_t;
	(release_flattened_array): Change signature to use awk_flat_array_t;
	* gawkapi.c (api_sym_update): Handle case where variable exists already.
	(api_get_array_element): Restore `wanted' parameter and pass it
	on to node_to_awk_value.
	(api_set_array_element): Revisse to match changed element type.
	(api_flatten_array): Revise signature, implement.
	(api_release_flattened_array): Revise signature, implement.

2012-06-17         Arnold D. Robbins     <arnold@skeeve.com>

	API Work:

	* gawkapi.h (get_array_element): Remove `wanted' parameter.
	(r_make_string): Comment the need for `api' and `ext_id' parameters.
	* gawkapi.c (api_sym_update): Move checks to front.
	Initial code for handling arrays. Still needs work.
	(api_get_array_element): Implemented.
	(api_set_array_element): Additional checking code.
	(api_del_array_element): Implemented.
	(api_create_array): Implemented.
	(init_ext_api): Force do_xxx values to be 1 or 0.
	(update_ext_api): Ditto.

2012-06-12         Arnold D. Robbins     <arnold@skeeve.com>

	API Work:

	* gawkapi.h (awk_value_t): Restore union.
	(get_curfunc_param): Renamed to get_argument. Return type changed
	to awk_bool_t. Semantics better thought out and documented.
	(awk_atexit, get_array_element): Return type now void.
	(sym_lookup): Return type now void. Argument order rationalized.
	* gawkapi.c (node_to_awk_value): Return type is now awk_bool_t.
	Semantics now match table in gawkawpi.h.
	(api_awk_atexit): Return type now void.
	(api_sym_lookup): Return type is now awk_bool_t. Change parameter
	order.
	(api_get_array_element): Return type is now awk_bool_t.

	Further API implementations and fixes for extension/testext.c:

	* awk.h (final_exit): Add declaration.
	* ext.c (load_ext): Change `func' to install_func.
	* gawkapi.c: Add casts to void for id param in all functions.
	(api_sym_update): Finish implementation.
	(api_get_array_element): Start implementation.
	(api_set_array_element): Add error checking.
	(api_get_element_count): Add error checking, return the right value.
	* main.c (main): Call final_exit instead of exit.
	(arg_assign): Ditto.
	* msg.c (final_exit): New routine to run the exit handlers and exit.
	(gawk_exit): Call it.
	* profile.c (dump_and_exit): Ditto.

2012-06-10         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Addition of time extension moved to "done" section.

2012-06-10         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.c (api_update_ERRNO_string): Treat boolean true as a request
	for TRANSLATE, and false as DONT_TRANSLATE.

2012-06-06         Arnold D. Robbins     <arnold@skeeve.com>

	* cint_array.c (tree_print, leaf_print): Add additional casts
	for printf warnings.

	* awk.h (update_ext_api): Add declaration.
	* gawkapi.c (update_ext_api): New function.
	* eval.c (set_LINT): Call update_ext_api() at the end.
	* gawkapi.h: Document that do_XXX could change on the fly.

	* awk.h (run_ext_exit_handlers): Add declaration.
	* msg.c (gawk_exit): Call it.

2012-06-05         Arnold D. Robbins     <arnold@skeeve.com>

	* ext.c (load_ext): Remove use of RTLD_GLOBAL. Not needed in new
	scheme. Clean up error messages.

2012-06-04         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Remove use of -export-dynamic for GCC.
	* configure: Regenerated.

2012-05-30         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (is_off_limits_var): Minor coding style edit.
	* gawkapi.c (awk_value_to_node): More cleanup.
	(node_to_awk_value): Use `wanted' for decision making.
	(api_sym_update): Start implementation. Needs more work.
	General: More cleanup, comments.
	* gawkapi.h (api_sym_update): Add additional comments.

2012-05-29         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (node_to_awk_value): Add third parameter indicating type
	of value desired. Based on that, do force_string or force_number
	to get the "other" type.
	(awk_value_to_node): Clean up the code a bit.
	(get_curfunc_param): Move forcing of values into node_to_awk_value.
	(api_sym_lookup): Add third parameter indicating type of value wanted.
	(api_get_array_element): Ditto.
	* gawk_api.h: Additional comments and clarifications. Revise APIs
	to take third 'wanted' argument as above.
	(awk_value_t): No longer a union so that both values may be accessed.
	All macros: Parenthesized the bodies.
	* bootstrap.sh: Rationalize a bit.

2012-05-26         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* Makefile.am (include_HEADERS): Add so gawkapi.h will be installed.
	(base_sources): Add gawkapi.h so that it is in dist tarball.
	* TODO.xgawk: Update.
	* main.c (is_off_limits_var): Stop returning true for everything
	except PROCINFO.

2012-05-25         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (is_off_limits_var): New function to check if a variable
	is one that an extension function may not change.
	* awk.h (is_off_limits_var): Declare it.
	* gawkapi.c (api_sym_lookup): Use it.

	* bootstrap.sh: Touch various files in the extension directory also.

2012-05-24         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* gawkapi.h (awk_param_type_t): Remove (use awk_valtype_t instead).
	(awk_ext_func_t): Pass a result argument, and return an awk_value_t *.
	(gawk_api.get_curfunc_param): Add a result argument.
	(gawk_api.set_return_value): Remove obsolete function.
	(gawk_api.sym_lookup, gawk_api.get_array_element): Add a result
	argument.
	(gawk_api.api_make_string, gawk_api.api_make_number): Remove hooks,
	since access to gawk internal state is not required to do this.
	(set_return_value): Remove obsolete macro.
	(get_curfunc_param, sym_lookup, get_array_element): Add result argument.
	(r_make_string, make_number): New static inline functions.
	(make_string, dup_string): Revise macro definitions.
	(dl_load_func): Remove global_api_p and global_ext_id args,
	and fix SEGV by setting api prior to checking its version members.
	(GAWK): Expand ifdef to include more stuff.
	* gawkapi.c (node_to_awk_value): Add result argument.
	(api_get_curfunc_param): Add result argument, and use awk_valtype_t.
	(api_set_return_value): Remove obsolete function.
	(awk_value_to_node): New global function to convert back into internal
	format.
	(api_add_ext_func): Simply call make_builtin.
	(node_to_awk_value): Add result argument, and handle Node_val case.
	(api_sym_lookup, api_get_array_element): Add result argument.
	(api_set_array_element): Implement.
	(api_make_string, api_make_number): Remove functions that belong on
	client side.
	(api_impl): Remove 3 obsolete entries.
	* TODO.xgawk: Update to reflect progress.
	* Makefile.am (base_sources): Add gawkapi.c.
	* awk.h: Include gawkapi.h earlier.
	(api_impl, init_ext_api, awk_value_to_node): Add declarations
	so we can hook in new API.
	(INSTRUCTION): Add new union type efptr for external functions.
	(extfunc): New define for d.efptr.
	(load_ext): Remove 3rd obj argument that was never used for anything.
	(make_builtin): Change signature for new API.
	* awkgram.y (load_library): Change 2nd argument to load_ext
	from dlload to dl_load, and remove pointless 3rd argument.
	* main.c (main): Call init_ext_api() before loading shared libraries.
	Change 2nd argument to load_ext from dlload to dl_load, and remove
	pointless 3rd argument.
	* ext.c (do_ext): Remove pointless 3rd argument to load_ext.
	(load_ext): Remove 3rd argument.  Port to new API (change initialization
	function signature).  If initialization function fails, issue a warning
	and return -1, else return 0.
	(make_builtin): Port to new API.
	* interpret.h (r_interpret): For Op_ext_builtin, call external functions
	with an awk_value_t result buffer, and convert the returned value
	to a NODE *.  For Node_ext_func, code now in extfunc instead of builtin.

2012-05-21         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac: Remove libtool, and call configure in the
	extension subdirectory.  Change pkgextensiondir to remove the
	version number, since the new API has builtin version checks.
	* TODO.xgawk: Update.
	* ltmain.sh: Removed, since libtool no longer used here.

2012-05-19         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Update to reflect progress and new issues.
	* main.c (main): Add -i (--include) option.
	(usage): Ditto.
	* awkgram.y (add_srcfile): Eliminate duplicates only for SRC_INC
	and SRC_EXTLIB sources (i.e. -f duplicates should not be removed).
	* io.c (find_source): Set DEFAULT_FILETYPE to ".awk" if not defined
	elsewhere.

2012-05-15         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Include "gawkapi.h" to get IOBUF.
	* gawkapi.h: Considerable updates.
	* gawkapi.c: New file. Start at implementing the APIs.

2012-05-13         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Update to reflect recent discussions and deletion of
	extension/xreadlink.[ch].

2012-05-11         Arnold D. Robbins     <arnold@skeeve.com>

	Sweeping change: Use `bool', `true', and `false' everywhere.

2012-04-09         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* eval.c (unset_ERRNO): Fix memory management bug -- need to use
	dupnode with Nnull_string.

2012-04-08         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* Makefile.am (valgrind): Define VALGRIND instead of redefining AWK.
	This allows test/Makefile.am to set up the command environment as
	desired.
	(valgrind-noleak): Ditto, plus set --leak-check=no instead of the
	default summary setting.

2012-04-07         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Update to reflect progress.

2012-04-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Move valgrind-noleak item into "done" section.
	* Makefile.am (valgrind-noleak): Add new valgrind rule that omits
	the "--leak-check=full" option to help spot more serious problems.

2012-04-01         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Move ERRNO item into "done" section.
	* awk.h (update_ERRNO, update_ERRNO_saved): Remove declarations.
	(update_ERRNO_int, enum errno_translate, update_ERRNO_string,
	unset_ERRNO): Add new declarations.
	* eval.c (update_ERRNO_saved): Renamed to update_ERRNO_int.
	(update_ERRNO_string, unset_ERRNO): New functions.
	* ext.c (do_ext): Use new update_ERRNO_string function.
	* io.c (ERRNO_node): Remove redundant extern declaration (in awk.h).
	(after_beginfile, nextfile): Replace update_ERRNO() with
	update_ERRNO_int(errno).
	(inrec): Replace update_ERRNO_saved with update_ERRNO_int.
	(do_close): Use new function update_ERRNO_string.
	(close_redir, do_getline_redir, do_getline): Replace update_ERRNO_saved
	with update_ERRNO_int.

2012-03-27         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: Update to reflect debate about how to support Cygwin
	and other platforms that cannot link shared libraries with unresolved
	references.
	* awkgram.y (add_srcfile): Minor bug fix: reverse sense of test
	added by Arnold in last patch.
	* configure.ac: AC_DISABLE_STATIC must come before AC_PROG_LIBTOOL.

2012-03-26         Arnold D. Robbins     <arnold@skeeve.com>

	Some cleanups.

	* awkgram.y (add_srcfile): Use whole messages, better for
	translations.
	* io.c (init_awkpath): Small style tweak.
	* main.c (path_environ): Straighten out initial comment, fix
	compiler warning by making `val' const char *.

2012-03-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* configure.ac (AC_DISABLE_STATIC): Add this to avoid building useless
	static extension libraries.

2012-03-25         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* TODO.xgawk: New file listing completed and pending xgawk enhancements.

2012-03-24         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* io.c (path_info): Fix white space.
	(pi_awkpath, pi_awklibpath): Avoid structure initializers.
	(do_find_source): Eliminate pointless parentheses.
	(find_source): Leave a space after "&".
	* main.c (load_environ): Fix typo in comment.

2012-03-21         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* awkgram.y (LEX_LOAD): New token to support @load.
	(grammar): Add rules to support @load.
	(tokentab): Add "load".
	(add_srcfile): Improve error message to distinguish between source files
	and shared libraries.
	(load_library): New function to load libraries specified with @load.
	(yylex): Add support for LEX_LOAD (treated the same way as LEX_INCLUDE).

2012-03-20         Andrew J. Schorr     <aschorr@telemetry-investments.com>

	* Makefile.am (EXTRA_DIST): Remove extension.
	(SUBDIRS): Add extension so libraries will be built.
	(DEFS): Define DEFLIBPATH and SHLIBEXT so we can find shared libraries.
	* awk.h (deflibpath): New extern declaration.
	* configure.ac: Add support for building shared libraries by adding
	AC_PROG_LIBTOOL and AC_SUBST for acl_shlibext and pkgextensiondir.
	(AC_CONFIG_FILES): Add extension/Makefile.
	* io.c (pi_awkpath, pi_awklibpath): New static structures to contain
	path information.
	(awkpath, max_pathlen): Remove static variables now inside pi_awkpath.
	(init_awkpath): Operate on path_info structure to support both
	AWKPATH and AWKLIBPATH.  No need for max_path to be static, since
	this should be called only once for each environment variable.
	(do_find_source): Add a path_info arg to specify which path to search.
	Check the try_cwd parameter to decide whether to search the current
	directory (not desirable for AWKLIBPATH).
	(find_source): Choose appropriate path_info structure based on value
	of the is_extlib argument.  Set EXTLIB_SUFFIX using SHLIBEXT define
	instead of hardcoding ".so".
	* main.c (path_environ): New function to add AWKPATH or AWKLIBPATH
	to the ENVIRON array.
	(load_environ): Call path_environ for AWKPATH and AWKLIBPATH.

2012-06-19         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Do setlocale to "C" if --characters-as-bytes.
	Thanks to "SP" for the bug report.

2012-05-09         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Added AC_HEADER_STDBOOL
	* awk.h, dfa.c, regex.c: Reworked to use results
	of test and include missing_d/gawkbool.h.

2012-05-07         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (prnode): Add casts to void* for %p format.
	* debug.c (print_instruction): Ditto.
	* builtin.c: Fix %lf format to be %f everywhere.

	Unrelated:

	* replace.c: Don't include "config.h", awk.h gets it for us.

2012-05-04         Arnold D. Robbins     <arnold@skeeve.com>

	* getopt.c [DJGPP]: Change to __DJGPP__.
	* mbsupport.h [DJGPP]: Change to __DJGPP__.

	Unrelated:

	* awk.h: Workarounds for _TANDEM_SOURCE.

2012-05-01         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep. RRI code now there, needed additional
	change for gawk.
	* configure.ac: Add check for stdbool.h.
	* regex.c: Add check for if not have stdbool.h, then define the
	bool stuff.

2012-04-27         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.
	* xalloc.h (xmemdup): Added, from grep, for dfa.c. Sigh.

2012-04-27         Arnold D. Robbins     <arnold@skeeve.com>

	Update to autoconf 2.69, automake 1.12.

	* INSTALL, aclocal.m4, configh.in, depcomp, install-sh, missing,
	mkinstalldirs, ylwrap: Updated.
	* configure.ac (AC_TYPE_LONG_LONG_INT, AC_TYPE_UNSIGNED_LONG_LONG_INT,
	AC_TYPE_INTMAX_T, AC_TYPE_UINTMAX_T): Renamed from gl_* versions.
	* configure: Regenerated.

2012-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	* cmd.h (dPrompt, commands_Prompt, eval_Prompt, dgawk_Prompt): Changed
	to dbg_prompt, commands_prompt, eval_prompt, dgawk_prompt.
	* debug.c: Ditto.
	* command.y: Ditto.  Some minor whitespace and comments cleanup.

2012-04-24         Arnold D. Robbins     <arnold@skeeve.com>

	io.c cleanup and some speedup for RS as regexp parsing.

	* awk.h (Regexp): New members has_meta and maybe_long.
	(enum redirval): Add redirect_none as value 0.
	(remaybelong): Remove function declaration.
	* awkgram.y: Use redirect_none instead of 0 for no redirect cases.
	* io.c (go_getline_redir): Second arg now of type enum redirval.
	Changed intovar into into_variable.
	(comments and whitespace): Lots of general cleanup.
	(socket_open): readle changed to read_len.
	(two_way_open): Add additional calls to os_close_on_exec.
	(rsrescan): Simplify code a bit and use RS->maybe_long.
	* re.c (make_regexp): Set up new members in Regexp struct.
	(remaybelong): Remove function.
	(reisstring): Simplified code.

2012-04-16  Eli Zaretskii  <eliz@gnu.org>

	* io.c (read_with_timeout) [__MINGW32__]: Just call the blocking
	'read', as 'select' is only available for sockets.
	* mpfr.c (set_ROUNDMODE) [!HAVE_MPFR]: Renamed from set_RNDMODE.
	* main.c (load_procinfo): Declare name[] also when HAVE_MPFR is
	defined even though HAVE_GETGROUPS etc. are not.

2012-04-12         John Haque      <j.eh@mchsi.com>

	* array.c, awk.h, awkgram.y, builtin.c, command.y, debug.c,
	field.c, mpfr.c, profile.c: Change RND_MODE to ROUND_MODE.

2012-04-11         John Haque      <j.eh@mchsi.com>

	* main.c (varinit): Change RNDMODE to ROUNDMODE.

2012-04-11         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c: Change --arbitrary-precision to --bignum.

2012-04-02         John Haque      <j.eh@mchsi.com>

	Add support for arbitrary-precision arithmetic.

	* mpfr.c: New file.
	* awk.h (struct exp_node): Add union to handle different number types.
	(MPFN, MPZN): New flag values.
	(DO_MPFR, do_mpfr): New defines.
	(PREC_node, RNDMODE_node): Add declarations.
	(PRECISION, RND_MODE, MNR, MFNR, mpzval, do_ieee_fmt): Add declarations.
	(make_number, str2number, format_val, cmp_numbers): Ditto.
	(force_number): Change definition.
	(Func_pre_exec, Func_post_exec): New typedefs.
	(POP_NUMBER, TOP_NUMBER): Change definitions.
	(get_number_ui, get_number_si, get_number_d, get_number_uj,
	iszero, IEEE_FMT, mpg_float, mpg_integer, mpg_float,
	mpg_integer): New defines.
	* awkgram.y (tokentab):	Add alternate function entries for MPFR/GMP.
	(snode): Choose the appropriate function.
	(negate_num): New function to negate a number.
	(grammar): Use it.
	(yylex): Adjust number handling code.
	* array.c (value_info, asort_actual, sort_user_func): Adjust for
	MPFR/GMP numbers.
	(do_adump, indent): Minor changes.
	(sort_up_index_number, sort_up_value_number, sort_up_value_type): Use
	cmp_numbers() for numeric comparisons.
	* builtin.c (mpz2mpfr): New function.
	(format_tree): Adjust to handle MPFR and GMP numbers.
	* eval.c (register_exec_hook): New function to manage interpreter hooks.
	(num_exec_hook, pre_execute, post_execute): New and adjusted definitions.
	(h_interpret): Renamed from debug_interpret.
	(init_interpret): Changed to use the new name.
	(flags2str): New entries for MPFN and MPZN.
	(cmp_nodes): Reworked to use separate routine for numeric comparisons.
	(set_IGNORECASE, set_BINMODE, set_LINT, update_NR, update_FNR,
	update_NF): Adjust code and some cleanup.
	* field.c (rebuild_record): Field copying code reworked to handle
	MPFR/GMP numbers.
	(set_NF): Minor adjustment.
	* io.c (INCREMENT_REC): New macro.
	(inrec, do_getline): Use the new macro.
	(nextfile, set_NR, set_FNR, get_read_timeout, pty_vs_pipe): Adjust code
	to handle MPFR/GMP numbers.
	* interpret.h (r_interpret): Adjust TOP_NUMBER/POP_NUMBER usage.
	(EXEC_HOOK): New macro and definition.
	(DEBUGGING): Removed.
	* main.c (DEFAULT_PREC, DEFAULT_RNDMODE): New defines.
	(opttab): New entry for option arbitrary-precision.
	(main): Handle the new option.
	(usage): Add to usage message.
	(varinit): Add PREC and RNDMODE.
	(load_procinfo): Install MPFR and GMP related items.
	(version): Append MPFR and GMP versions to message.
	* msg.c (err) : Adjust FNR handling with MPFR/GMP.
	* node.c (r_format_val): Renamed from format_val.
	(r_force_number): Return NODE * instead of AWKNUM.
	(make_number, str2number, format_val, cmp_numpers: Defined and initialized.
	(r_unref): Free MPFR/MPZ numbers.
	(get_numbase): Renamed from isnondecimal and return the base.
	(cmp_awknums): New function to compare two AWKNUMs.
	* command.y (yylex): Adjust number handling code.
	(grammar): Minor adjustments to handle negative numbers.
	* debug.c (init_debug): New function.
	(do_info, do_set_var, watchpoint_triggered, serialize,
	initialize_watch_item, do_watch, print_watch_item): Minor adjustments.
	(debug_pre_execute): Adjusted to handle MPFR and GMP numbers.

2012-04-09         Arnold D. Robbins     <arnold@skeeve.com>

	* INSTALL, config.guess, config.sub, depcomp, install-sh,
	missing, mkinstalldirs, ylwrap: Update to latest from automake 1.11.4.

2012-04-08         Arnold D. Robbins     <arnold@skeeve.com>

	* Update various files to automake 1.11.4.

2012-03-30         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (GAWK_AC_NORETURN): Do as macro instead of inline.

2012-03-29         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.h, dfa.c: Sync with grep. Major cleanups and some changes
	there.
	* re.c (research): Pass size_t* to dfaexec to match type change.
	* configure.ac (AH_VERBATIM[_Noreturn]): Added from Paul Eggert to
	ease compiling.
	(AC_INIT): Bump version.
	* configure, configh.in, version.c: Regenerated.

2012-03-28         Arnold D. Robbins     <arnold@skeeve.com>

	* 4.0.1: Release tar ball made.

2012-03-28         Arnold D. Robbins     <arnold@skeeve.com>

	* getopt.c: Add DJGPP to list of platforms where it's ok
	to include <stdlib.h>.
	* awkgram.y, builtin.c, ext.c, mbsupport.h, re.c: Update
	copyright year.

2012-03-21         Corinna Vinschen      <vinschen@redhat.com>

	* getopt.c: Add Cygwin to list of platforms where it's ok
	to include <stdlib.h>.

2012-03-20         Arnold D. Robbins     <arnold@skeeve.com>

	Get new getopt to work on Linux and C90 compilers:

	* getopt.c: Undef ELIDE_CODE for gawk.
	(_getopt_internal_r): Init first.needs_free to 0. In test for -W
	move executable code to after declarations for C90 compilers.
	* getopt1.c: Undef ELIDE_CODE for gawk.

	Minor bug fix with printf, thanks to John Haque:

	* builtin.c (format_tree): Initialize base to zero at the top
	of the while loop.

	Getting next tar ball ready:

	* configure.ac: Remove duplicate check for wcscoll. Thanks
	to Stepan Kasal.

2012-03-16         Arnold D. Robbins     <arnold@skeeve.com>

	* getopt.c, getopt.h, getopt1.c, getopt_int.h, regcomp.c,
	regex.c, regex.h, regex_internal.c, regex_internal.h,
	regexec.c: Sync with GLIBC, what the heck.

2012-03-14         Eli Zaretskii  <eliz@gnu.org>

	* mbsupport.h (btowc): Change for non-DJGPP.
	* re.c (dfaerror): Add call to exit for DJGPP.

2012-03-14         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.c (re_string_skip_chars): Fix calculation of
	remain_len with m.b. chars. Thanks to Stanislav Brabec
	<sbrabec@suse.cz>.

2012-02-28         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (init_groupset): Make `getgroups' failing a non-fatal
	error.  After all, what's the big deal?  Should help on Plan 9.

2012-02-27         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (parse_bracket_exp): Revert changes 2012-02-15 to stay
	in sync with grep.
	* dfa.h (dfarerror): Add __attribute__ from grep.

2012-02-15         Arnold D. Robbins     <arnold@skeeve.com>

	Fix warnings from GCC 4.6.2 -Wall option.

	* awkgram.y (newline_eof): New function to replace body of
	NEWLINE_EOF macro.
	(yylex): Replace body of NEWLINE_EOF macro.
	* dfa.c (parse_bracket_exp): Init variables to zero.
	* ext.c (dummy, junk): Remove.
	* regex_internal.c (re_string_reconstruct): Remove buf array. It was
	set but not used.

2012-02-10         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2012-02-07         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Move init of `output_fp' to before parsing of
	program so that error messages from msg.c don't dump core.
	Thanks to Michael Haardt <michael@moria.de>.

2012-01-13         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c [is_valid_unibtye_character]: Fix from GNU grep to
	bug reported by me from Scott Deifik for DJGPP.

2012-01-03         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2012-01-02         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (Read_can_timeout, Read_timeout, Read_default_timeout):
	Renamed to use lower case.
	Other minor stylistic edits.

2012-01-01         John Haque      <j.eh@mchsi.com>

	* awk.h (struct iobuf): New entry read_func.
	* io.c (Read_can_timeout, Read_timeout, Read_default_timeout):
	New variables.
	(init_io): New routine to initialize the variables.
	(in_PROCINFO): New "clever" routine to parse elements with indices
	separated by a SUPSEP.
	(get_read_timeout): New routine to read timeout value for an IOBUF.
	(read_with_timeout): New routine to read from a fd with a timeout.
	(pty_vs_pipe): Use in_PROCINFO().
	(get_a_record): Set the timeout value and the read routine as necessary.
	* main.c (main): Call init_io().

2011-12-31         Arnold D. Robbins     <arnold@skeeve.com>

	* profile_p.c: Remove the file.
	* msg.c (err): Remove check for name being dgawk.

2011-12-31         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h [STREQ, STREQN]: Remove macros.
	* awkgram.y, builtin.c, command.y, debug.c, eval.c,
	io.c, msg.c: Change all uses to call strcmp, strncmp.

2011-12-28         Arnold D. Robbins     <arnold@skeeve.com>

	* int_array.c, str_array.c: Fix some compiler warnings 32/64
	bit system differences.

2011-12-26         John Haque      <j.eh@mchsi.com>

	Merge gawk, pgawk and dgawk into a single executable gawk.

	* awk.h (DO_PRETTY_PRINT, DO_PROFILE, DO_DEBUG,
	do_pretty_print, do_debug): New defines.
	(interpret): New variable, a pointer to an interpreter routine.
	(enum exe_mode): Nuked.
	* main.c (opttab): New options --pretty-print and --debug;
	Remove option --command.
	(usage): Update usage messages.
	* interpret.h: New file.
	* eval.c (r_interpret): Move to the new file.
	(debug_interpret): New interpreter routine when debugging.
	(init_interpret): New routine to initialize interpreter related
	variables.
	* eval_d.c, eval_p.c: Delete files.
	* debug.c (interpret): Renamed to debug_prog.
	(DEFAULT_PROMPT, DEFAULT_HISTFILE, DEFAULT_OPTFILE): Remove prefix 'd'.
	* profile.c (init_profiling): Nuked.
	* Makefile.am: Adjusted.

	Add command line option --load for loading extensions.

	* awk.h (srctype): Add new source type SRC_EXTLIB.
	* ext.c(load_ext): New routine to load extension.
	(do_ext): Adjust to use load_ext().
	* main.c (opttab): Add new option --load.
	(main): Call load_ext() to load extensions.
	(usage): Add usage message for the new option.
	* io.c (get_cwd): New routine.
	(do_find_source): Use the new routine.
	(find_source): Handle new type SRC_EXTLIB.
	* awkgram.y (parse_program, next_sourcefile): Skip type SRC_EXTLIB.
	(add_srcfile): Adjust call to find_source.
	* debug.c (source_find): Same.

	Unrelated:

	* ext.c (get_argument): Fixed argument parsing.
	* array.c (null_array_func): Reworked array routines for an empty array.
	* str_array.c, int_array.c: Make GCC happy, use %u instead of %lu
	printf formats.
	* eval.c (node_Boolean): New array for TRUE and FALSE nodes.
	(init_interpret): Create the new nodes.
	(eval_condition): Add test for the new nodes.
	(setup_frame): Disable tail-recursion optimization when profiling.
	* interpret.h (r_interpret): Use the boolean nodes instead of making
	new ones when needed.

2011-12-26         Arnold D. Robbins     <arnold@skeeve.com>

	Finish Rational Range Interpretation (!)

	* dfa.c (match_mb_charset): Compare wide characters directly
	instead of using wcscoll().
	* regexec.c (check_node_accept_byte): Ditto.

	Thanks to Paolo Bonzini for pointing these out.

2011-12-06         John Haque      <j.eh@mchsi.com>

	* debug.c (source_find): Fix misplaced call to efree.
	* profile.c (redir2str): Add a missing comma in the redirtab array.
	* eval.c (r_interpret): Disallow call to exit if currule is undefined.
	This avoids the possibility of running END blocks more than once when
	used in a user-defined sorted-in comparison function.
	* array.c (sort_user_func): Adjust appropriately.

2011-12-06         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h, mbsupport.h: Changes for MBS support on DJGPP
	and z/OS.
	* io.c: Disable pty support on z/OS.

2011-11-27         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.
	* dfa.h: Add _GL_ATTRIBUTE_PURE macro. Bleah.

2011-11-14         John Haque      <j.eh@mchsi.com>

	* debug.c (set_breakpoint_at): Fix problem with setting
	breakpoints in a switch statement. Thanks to Giorgio Palandri
	<giorgio.palandri@gmail.com> for the bug report.

2011-11-14         Arnold D. Robbins     <arnold@skeeve.com>

	* mbsupport.h: Add check for HAVE_BTOWC, per Pat Rankin.

2011-11-12         Eli Zaretskii  <eliz@gnu.org>

	* mbsupport.h: Additional glop for dfa.c in Windows environment.

2011-11-01         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Move glop for ! MBS_SUPPORT to ...
	* mbsupport.h: ... here.
	* replace.c: Include missing_d/wcmisc.c if ! MBS_SUPPORT.
	* regex_internal.h: Move include of mbsupport.h up and add
	additional checks to avoid inclusion of wctype.h and wchar.h.

2011-10-27         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_strftime): Per Pat Rankin, instead of casting
	fclock, use a long variable and check for negative or overflow.

2011-10-25         Arnold D. Robbins     <arnold@skeeve.com>

	Merge with gawk_performance branch done. Additionally:

	* cint_array.c, int_array.c, str_array.c: Fix compiler complaints
	about printf formats (signed / unsigned vs. %d / %u).
	* eval.c (setup_frame): Add a missing return value.

2011-10-25         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (dist-hook): Use `cd $(srcdir)/pc' so that
	`make distcheck' works completely.
	* builtin.c (do_strftime): Add cast to long int in check
	for fclock < 0 for systems where time_t is unsigned (e.g., VMS).

2011-10-25  Stefano Lattarini  <stefano.lattarini@gmail.com>

	dist: generated file `version.c' is not removed by "make distclean"

	* Makefile.am (distcleancheck_listfiles): Define to ignore the
	generated `version.c' file.

2011-10-24         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c (wcscoll): Create for VMS.
	* Makefile.am (dist-hook): Run sed scripts to make pc/config.h.

2011-10-24  Eli Zaretskii  <eliz@gnu.org>

	* builtin.c [HAVE_POPEN_H]: Include "popen.h".
	* README.git: Update for pc/ systems.

2011-10-21         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (distcleancheck_listfiles): Added, per advice from
	Stefano Lattarini <stefano.lattarini@gmail.com>.
	* dfa.c: Additional faking of mbsupport for systems without it;
	mainly VMS.

2011-10-21  Stefano Lattarini  <stefano.lattarini@gmail.com>

	* configure.ac (AM_C_PROTOTYPES): Remove call to this macro.
	The comments in configure.ac said that the call to AM_C_PROTOTYPES
	was needed for dfa.h, synced from GNU grep; but this statement is
	not true anymore in grep since commit v2.5.4-24-g9b5e7d4 "replace
	AC_CHECK_* with gnulib modules", dating back to 2009-11-26.  Also,
	the support for automatic de-ANSI-fication has been deprecated in
	automake 1.11.2, and will be removed altogether in automake 1.12.
	* vms/vms-conf.h (PROTOTYPES, __PROTOTYPES): Remove these #define,
	they are not used anymore.
	* pc/config.h (PROTOTYPES): Likewise.

2011-10-18         Dave Pitts            <dpitts@cozx.com>

	* dfa.c: Move some decls to the top of their functions for
	C90 compilers.

2011-10-18         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_strftime): Add check for negative / overflowed
	time_t value with fatal error. Thanks to Hermann Peifer
	<peifer@gmx.eu> for the bug report.
	* dfa.c (setbit_wc): Non-MBS version. Add a return false
	since VMS compiler doesn't understand that abort doesn't return.

2011-10-10         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Init textlen to zero to avoid "may be
	used uninitialized" warning. Thanks to Corinna Vinschen for
	pointing this out.
	* eval.c (unwind_stack): Add parentheses around condition in while
	to avoid overzealous warning from GCC.

2011-09-30  Eli Zaretskii  <eliz@gnu.org>

	* io.c (remap_std_file): Fix non-portable code that caused
	redirected "print" to fail if a previous read from standard input
	returned EOF.  Reported by David Millis <tvtronix@yahoo.com>.
	(remap_std_file): Per Eli's suggestion, removed the leading close
	of oldfd and will let dup2 do the close for us.

2011-10-11         John Haque     <j.eh@mchsi.com>

	* symbol.c: Add licence notice.
	* array.c (PREC_NUM, PREC_STR): Define as macros.

2011-10-09         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2011-10-07         John Haque     <j.eh@mchsi.com>

	Tail recursion optimization.
	* awkgram.y (grammar, mk_function): Recognize tail-recursive
	calls.
	* awk.h (tail_call, num_tail_calls): New defines.
	* eval.c (setup_frame): Reuse function call stack for
	tail-recursive calls.
	(dump_fcall_stack): Reworked.

2011-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h, main.c (gawk_mb_cur_max): Make it a constant 1 when
	MBS_SUPPORT isn't available to allow GCC dead code constant
	expression computation and dead code elimination to help out.

2011-10-02         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (rsnullscan, get_a_record): Fix the cases where terminators
	are incomplete when RS == "". Also fix the case where the new value
	is shorter than the old one.  Based on patch from Rogier
	<rogier777@gmail.com> as submitted by Jeroen Schot
	<schot@A-Eskwadraat.nl>.

2011-09-24         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c, io.c, re.c: Fix some spelling errors. Thanks to
	Jeroen Schot <schot@A-Eskwadraat.nl>.

2011-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c, mbsupport.h: Sync with GNU grep. Large amount of changes
	that remove many ifdefs, moving many conditions for multibyte
	support into regular C code and relying GCC's dead code optimization
	to eliminate code that won't be needed.
	* dfa.c: For gawk, add a number of additional defines so that things
	will compile if MBS_SUPPORT is 0.
	* array.c, awk.h, awkgram.y, builtin.c, eval.c, field.c, main.c,
	node.c, re.c: Change `#ifdef MBS_SUPPORT' to `#if MBS_SUPPORT'.
	* awk.h, regex_internal.h: Move NO_MBSUPPORT handling to ...
	* mbsupport.h: ...here.

2011-09-16         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2011-09-08         John Haque     <j.eh@mchsi.com>

	Optimization for compound assignment, increment and
	decrement operators; Avoid unref and make_number calls
	when there is no extra references to the value NODE.

2011-09-03         Arnold D. Robbins     <arnold@skeeve.com>

	* dfa.c: Sync with GNU grep.

2011-08-31         John Haque     <j.eh@mchsi.com>

	Grammar related changes: Simplify grammar for user-defined
	functions and general cleanups.

	* symbol.c: New file.
	* awkgram.y: Move symbol table related routines to the
	new file.
	(rule, func_name, function_prologue, param_list): Reworked.
	(install_function, check_params): Do all error checks
	for the function name and parameters before installing in
	the symbol table.
	(mk_function): Finalize function definition.
	(func_install, append_param, dup_params): Nuked.
	* symbol.c (make_params): allocate function parameter nodes
	for the symbol table. Use the hash node as Node_param_list;
	Saves a NODE for each parameter.
	(install_params): Install function parameters into the symbol
	table.
	(remove_params): Remove parameters out of the symbol table.
	* awk.h (parmlist, FUNC): Nuked.
	(fparms): New define.

	Dynamically loaded function parameters are now handled like
	those for a builtin.

	* awk.h (Node_ext_func, Op_ext_builtin): New types.
	(Op_ext_func): Nuked.
	* ext.c (make_builtin): Simplified.
	(get_curfunc_arg_count): Nuked; Use the argument 'nargs' of
	the extension function instead.
	(get_argument, get_actual_argument): Adjust.
	* eval.c (r_interpret): Update case Op_func_call for a dynamic
	extension function. Handle the new opcode Op_ext_builtin.
	* pprint (profile.c): Adjust.

	Use a single variable to process gawk options.

	* awk.h (do_flags): New variable.
	(DO_LINT_INVALID, DO_LINT_ALL, DO_LINT_OLD, DO_TRADITIONAL,
	DO_POSIX, DO_INTL, DO_NON_DEC_DATA, DO_INTERVALS,
	DO_PROFILING, DO_DUMP_VARS, DO_TIDY_MEM,
	DO_SANDBOX): New defines.
	(do_traditional, do_posix, do_intervals, do_intl,
	do_non_decimal_data, do_profiling, do_dump_vars,
	do_tidy_mem, do_sandbox, do_lint,
	do_lint_old): Defined as macros.
	* main.c: Remove definitions of the do_XX variables. Add
	do_flags definition.
	* debug.c (execute_code, do_eval, parse_condition): Save
	do_flags before executing/parsing and restore afterwards.

	Nuke PERM flag. Always increment/decrement the reference
	count for a Node_val. Simplifies macros and avoids
	occasional memory leaks, specially in the debugger.

	* awk.h (UPREF, DEREF, dupnode, unref): Simplified.
	(mk_number): Nuked.
	* (*.c): Increment the reference count of Nnull_string before
	assigning as a value.

	Revamped array handling mechanism for more speed and
	less memory consumption.

	* awk.h (union bucket_item, BUCKET): New definitions. Used as
	bucket elements for the hash table implementations of arrays;
	40% space saving in 32 bit x86.
	(buckets, nodes, array_funcs, array_base, array_capacity,
	xarray, alookup, aexists, aclear, aremove, alist,
	acopy, adump, NUM_AFUNCS): New defines.
	(array_empty): New macro to test for an empty array.
	(assoc_lookup, in_array): Defined as macros.
	(enum assoc_list_flags): New declaration.
	(Node_ahash, NUMIND): Nuked.
	* eval.c (r_interpret): Adjust cases Op_subscript,
	Op_subscript_lhs, Op_store_var and Op_arrayfor_incr.
	* node.c (dupnode, unref): Removed code related to Node_ahash.
	* str_array.c: New file to handle array with string indices.
	* int_array.c: New file to handle array with integer indices.
	* cint_array.c: New file. Special handling of arrays with
	(mostly) consecutive integer indices.

	Memory pool management reworked to handle NODE and BUCKET.

	* awk.h (struct block_item, BLOCK, block_id): New definitions.
	(getblock, freeblock): New macros.
	(getbucket, freebucket): New macros to allocate and deallocate
	a BUCKET.
	(getnode, freenode): Adjusted.
	* node.c (more_nodes): Nuked.
	(more_blocks): New routine to allocate blocks of memory.

2011-08-24         Arnold D. Robbins     <arnold@skeeve.com>

	Fix pty co-process communication on Ubuntu GNU/Linux.

	* io.c: Add include of <sys/ioctl.h> to get definition of TIOCSCTTY.
	(two_way_open): Move call for this ioctl to after setsid() call.

2011-08-23         Arnold D. Robbins     <arnold@skeeve.com>

	* regex_internal.c (re_string_fetch_byte_case): Remove
	__attribute((pure)) since it causes failures with gcc -O2
	-fno-inline. Thanks to Neil Cahill <ncahill_alt@yahoo.com>
	for reporting the bug.

2011-08-10         John Haque      <j.eh@mchsi.com>

	BEGINFILE/ENDFILE related code redone.

	* awk.h (prev_frame_size, has_endfile, target_get_record,
	target_newfile): New defines.
	* awkgram.y (mk_program): Initialize has_endfile appropriately for
	Op_get_record.
	(parse_program): Initialize new jump targets for
	Op_get_record and Op_newfile.
	* eval.c (unwind_stack): Change argument to number of
	items to be left in the stack. Adjust code.
	(pop_fcall, pop_stack): New defines.
	(setup_frame): Initialize prev_frame_size.
	(exec_state, EXEC_STATE): New structure and typedef.
	(exec_state_stack): New variable.
	(push_exec_state, pop_exec_state): New functions to save and
	later retrieve an execution state.
	(r_interpret): Use the new functions and the defines in
	cases Op_K_getline, Op_after_beginfile, Op_after_endfile,
	Op_newfile and Op_K_exit.
	* io.c (after_beginfile): When skipping a file using nextfile,
	return zero in case there was an error opening the file.
	(has_endfile): Nuke global variable.
	(inrec): Add a second argument to pass errno to the calling
	routine.
	* debug.c (print_instruction): Update cases.

2011-08-10         Arnold D. Robbins     <arnold@skeeve.com>

	Fix (apparently long-standing) problem with FIELDWIDTHS.
	Thanks to Johannes Meixner <jsmeix@suse.de>.

	* field.c (set_FIELDWIDTHS): Adjust calculations.

	Fix problem with FPAT, reported by "T. X. G." <leopardie333@yahoo.com>

	* awk.h (Regexp): Add new member 'non_empty'.
	* field.c (fpat_parse_field): Save/restore local variable non_empty
	from member in Regexp struct.

2011-08-09         Arnold D. Robbins     <arnold@skeeve.com>

	Fix pty issue reported by "T. X. G." <leopardie333@yahoo.com>

	* configure.ac: Check for setsid.
	* awk.h: If not HAVE_SETSID define it as an empty macro.
	* io.c (two_way_open): Call setsid if using pty's.

2011-07-29  Eli Zaretskii  <eliz@gnu.org>

	* builtin.c (format_tree): Rename small -> small_flag,
	big -> big_flag, bigbig -> bigbig_flag.  Solves compilation errors
	when building Gawk with libsigsegv on MS-Windows, see
	https://lists.gnu.org/archive/html/bug-gawk/2011-07/msg00029.html.

2011-07-28         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Revert to gawk 3.1 behavior for backslash
	handling. It was stupid to think I could break compatibility.
	Thanks to John Ellson <ellson@research.att.com> for raising
	the issue.

2011-07-26         John Haque      <j.eh@mchsi.com>

	* eval.c (r_interpret): In cases Op_var_assign and Op_field_assign,
	include Op_K_getline_redir in the test for skipping the routine.

2011-07-26         John Haque      <j.eh@mchsi.com>

	Fix handling of assign routines for 'getline var'.
	Rework the previous fix for (g)sub.

	* awk.h: New define assign_ctxt for use in Op_var_assign
	and Op_field_assign opcodes. Remove define AFTER_ASSIGN.
	* awkgram.y (snode, mk_getline): Initialize assign_ctxt.
	* builtin.c (do_sub): Adjust to take only the first two
	arguments.
	* eval.c (r_interpret): In cases Op_var_assign and Op_field_assign,
	skip the routine as appropriate. Adjust case Op_sub_builtin.
	* main.c (get_spec_varname): New function.
	* debug.c (print_instruction): Use the new function to get
	special variable name.

2011-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (varinit): Mark FPAT as NON_STANDARD. Thanks to
	Wolfgang Seeberg <wolfgang.seeberg@yahoo.com> for the report.
	* Makefile.am (EXTRA_DIST): Add po/README, per advice from
	Bruno Haible.
	* dfa.c: Sync with GNU grep.
	* xalloc.h (xzalloc): New function, from GNU grep, for dfa.c.
	* README: Note that bug list is really a real mailing list.

2011-07-16         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (AUTOMAKE_OPTIONS): Removed.
	* configure.ac (AM_INIT_AUTOMAKE): Removed dist-bzip2 option, on
	advice from Karl Berry.

2011-07-15         John Haque      <j.eh@mchsi.com>

	* awk.h (Op_sub_builtin): New opcode.
	(GSUB, GENSUB, AFTER_ASSIGN, LITERAL): New flags for
	Op_sub_builtin.
	* awkgram.y (struct tokentab): Change opcode to	Op_sub_builtin
	for sub, gsub and gensub.
	(snode): Update processing of sub, gsub and gensub.
	* builtin.c (do_sub, do_gsub, do_gensub): Nuke.
	(sub_common): Renamed to do_sub. Relocate gensub argument
	handling code from do_gensub to here; Simplify the code a
	little bit.
	* eval.c (r_interpret): Handle Op_sub_builtin. Avoid field
	re-splitting or $0 rebuilding if (g)sub target string is
	a field and no substitutions were done.
	* pprint (profile.c): Add case for the new opcode.
	* print_instruction (debug.c): Ditto.

	Take out translation for errno strings; extensions will
	need to use their own domain.

	* awk.h (enum errno_translate): Removed.
	(update_ERRNO_string): Remove second translate parameter.
	* eval.c (update_ERRNO_string): Remove second translate parameter
	and code that used it.
	* gawkapi.h (api_update_ERRNO_string): Remove third translate
	parameter.
	* gawkapi.c (api_update_ERRNO_string): Remove third translate
	parameter and change call to update_ERRNO_string.
	* io.c (do_close): Fix call to update_ERRNO_string.

2011-07-15         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Typo fix: "loner" --> longer. Thanks to Nelson Beebe.
	* builtin.c (efwrite): Fix flushing test back to what it was
	in 3.1.8. Thanks to Strefil <strefil@yandex.ru> for the problem
	report.
	* configure.ac: Bump version to 4.0.0a for stable branch.

2011-06-24         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (EXTRA_DIST): Add ChangeLog.0.
	* 4.0.0: Remake the tar ball.

2011-06-23         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Update version to 4.0.0.
	* configure: Regenerated.
	* ChangeLog.0: Rotated ChangeLog into this file.
	* ChangeLog: Created anew for gawk 4.0.0 and on.
	* README: Bump version to 4.0.0.
	* 4.0.0: Release tar ball made.
